Appendices
Contents
1 List of Standards Organizations
2 Abbreviations for Use on Drawings and in Text—American National Standard
3 Useful Formulas for Geometric Entities
4 Running and Sliding Fits—American National Standard
5 Clearance Locational Fits—American National Standard
6 Transition Locational Fits—American National Standard
7 Interference Locational Fits—American National Standard
8 Force and Shrink Fits—American National Standard
9 International Tolerance Grades
10 Preferred Metric Hole Basis Clearance Fits—American National Standard
11 Preferred Metric Hole Basis Transition and Interference Fits—American National Standard
12 Preferred Metric Shaft Basis Clearance Fits—American National Standard
13 Preferred Metric Shaft Basis Transition and Interference Fits—American National Standard
14 Screw Threads, American National, Unified, and Metric
15 Twist Drill Sizes—American National Standard and Metric
16 Acme Threads, General Purpose
17 Bolts, Nuts, and Cap Screws—Square and Hexagon—American National Standard and Metric
18 Cap Screws, Slotted and Socket Head—American National Standard and Metric
19 Machine Screws—American National Standard and Metric
20 Keys—Square, Flat, Plain Taper, and Gib Head
21 Screw Threads—Square and Acme
22 Woodruff Keys—American National Standard
23 Woodruff Key Sizes for Different Shaft Diameters
24 Pratt and Whitney Round-End Keys
25 Washers, Plain—American National Standard
26 Washers, Lock—American National Standard
27 Wire Gage Standards
28 Taper Pins—American National Standard
29 Cotter Pins—American National Standard
30 Metric Equivalents
31 Welding Symbols and Processes—American Welding Society Standard
32 Topographic Symbols
33 Piping Symbols—American National Standard
34 Heating, Ventilating, and Ductwork Symbols—American National Standard
35 American National Standard Graphical Symbols for Electronic Diagrams
36 Form and Proportion of Datum Symbols
37 Form and Proportion of Geometric Characteristic Symbols
38 Form and Proportion of Geometric Dimensioning Symbols
39 Form and Proportion of Modifying Symbols
40 Form and Proportion of Dimensioning Symbols and Letters
41 Comparison of Symbols
42 Wrought Steel Pipe and Taper Pipe Threads—American National Standard
43 Cast Iron Pipe Thicknesses and Weights—American National Standard
44 Cast Iron Pipe Screwed Fittings, 125 lb—American National Standard
45 Cast Iron Pipe Screwed Fittings, 250 lb—American National Standard
46 Cast Iron Pipe Flanges and Fittings, 125 lb—American National Standard
47 Cast Iron Pipe Flanges, Drilling for Bolts and Their Lengths, 125 lb—American National Standard
48 Shaft Center Sizes
49 Cast Iron Pipe Flanges and Fittings, 250 lb—American National Standard
50 Cast Iron Flanges, Drilling for Bolts and Their Lengths, 250 lb—American National Standard
51 Types of Scales
52 Additional Geometric Constructions
1 List of Standards Organizations
American National Standards Institute, 11 West 42nd St., New York, NY, 10036. For complete listing of standards, see the ANSI catalog of American National Standards, or visit http://webstore.ansi.org.
Standards from the following developers are available at http://webstore.ansi.org/sdo.aspx.
AA
Aluminum Association
AAMI
Association for the Advancement of Medical Instrumentation
ABYC
American Boat & Yacht Council
ABMA
American Bearing Manufacturers Association
ACC
American Chemistry Council
ACHC
Accreditation Commission for Health Care
ADA
American Dental Association
AGA
American Gas Association
AGMA
American Gear Manufacturers Association
AIAA
American Institute of Aeronautics and Astronautics
AIAG
Automotive Industry Action Group
AIHA
American Industrial Hygiene Association
AIIM
Association for Information and Image Management
AHAM
Association of Home Appliance Manufacturers
AMT
The Association for Manufacturing Technology
APTA
American Public Transportation Association
AHRI
Air-Conditioning and Refrigeration Institute
ARMA
ARMA International
APSP
Association of Pool and Spa Professionals
ASA
Acoustical Society of America
ASABE
American Society of Agricultural and Biological Engineers
ASCE
American Society of Civil Engineers
ASHRAE
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
ASME
American Society of Mechanical Engineers
ASQ
American Society for Quality
ASSE
The American Society of Safety Engineers
ASTM
ASTM International
ATIS
Alliance for Telecommunications Industry Solutions
AWWA
American Water Works Association
AWS
American Welding Society
BHMA
Builders Hardware Manufacturers Association
BSI
British Standards Institution
CAM-I
Consortium of Advanced Management International
CITRA
Center for International Regulatory Assistance
CGA
Compressed Gas Association, Inc.
CLSI
Clinical and Laboratory Standards Institute
CSA
Canadian Standards Association
DIN
Deutsches Institut für Normung
DOD
U.S. Department of Defense
ESTA
Entertainment Services and Technology Association
ETSI
European Telecommunications Standards Institute
GISC
Glazing Industry Secretariat Committee
GEIA
Government Electronics & Information Technology Association
GTEEMC
Georgia Tech Energy and Environmental Management Center
HL7
Health Level Seven
IAPMO
International Association of Plumbing and Mechanical Officials
I3A
International Imaging Industry Association
ICBO
International Conference of Building Officials
ICC
International Code Council
IEC
International Electrotechnical Commission
IEEE
Institute of Electrical and Electronics Engineers
IESNA
Illuminating Engineering Society of North America
IESO
Indoor Environmental Standards Organization
IEST
Institute of Environmental Sciences and Technology
IFI
Industrial Fasteners Institute
IICRC
Institute of Inspection, Cleaning and Restoration Certification
INCITS
International Committee for Information Technology Standards
IPC
Association Connecting Electronics Industries
ISA
International Society of Automation
ISEA
International Safety Equipment Association
ISO
International Organization for Standardization
JIS
Japanese Industrial Standards
KOK
Metric eBooks
LIA
Laser Institute of America
Manufacturers Standardization Society of the Valve and Fittings Industry, Inc.
MTS
Institute for Market Transformation to Sustainability
NACE
National Association of Corrosion Engineers
NAESB
North American Energy Standards Board
NADCA
North American Die Casting Association
NASPO
North American Security Products Organization
NECA
National Electrical Contractors Association
NETA
InterNational Electrical Testing Association
NFPA
National Fire Protection Association
NFPA
National Fluid Power Association
NISO
National Information Standards Organization
NPES
National Printing Equipment and Supply Association, Inc.
NPPC
National Pork Producers Council
NSF
NSF International
OEOSC
Optics and Electro-Optics Standards Council
OLA
Optical Laboratories Association
OPEI
Outdoor Power Equipment Institute
PCC
ANSI Partially Controlled Collections
PMMI
Packaging Machinery Manufacturers Institute
PSDA
Print Services and Distribution Association
RIA
Robotic Industries Association
SAI
Standards Australia
SCTE
Society of Cable Telecommunications Engineers
SEMI
Semiconductor Equipment and Materials International
SES
Standards Engineering Society
SIA
Scaffold Industry Association
SIA
Security Industry Association
SIS
Swedish Standards Institute
SPC
Standards Press of China
TAPPI
Technical Association of the Pulp and Paper Industry
TCNA
Tile Council of North America
WMMA
Wood Machinery Manufacturers Association
WPC
Washington Publishing Company
X9
X9, Inc.
2 Abbreviations for Use on Drawings and in Text—American National Standard
Selected abbreviations reprinted from ANSI/ASME Y14.38–2007, by permission of the American Society of Mechanical Engineers. All rights reserved.
A
abbreviation
ABBR
about
ABT
above
ABV
above baseline
ABL
abrasive
ABRSV
absolute
ABS
absorption
ABSORB
accelerate
ACCEL
accelerator
ACLTR
accelerometer
ACCLRM
acceptor
ACPTR
access
ACS
access opening
AO
access panel
AP
accessory
ACCESS
account
ACCT
accumulate
ACCUM
accumulator
ACC
acetate
ACTT
acetylene
ACET
acoustic
ACST
acoustical tile ceiling
ATC
across
ACR
across flats
ACRFLT
acrylic
ACRYL
actual
ACTL
actuate
ACTE
actuating
ACTG
actuator
ACTR
adapter
ADPTR
addendum
ADD
additional
ADDL
additive
ADDT
address
ADRS
adhesive
ADH
adjacent
ADJ
adjustable speed
ADJSP
administer
ADMIN
adsorbent
ADSORB
advance
ADV
advisory
ADVSY
aerodynamic
AERODYN
aeronautic
AERO
aeronautical national taper pipe thread
ANPT
after
AFT
aggregate
AGGR
aileron
AIL
air blast circuit breaker
ABCB
air circuit breaker
ACB
air cleaner
AIRCLNR
air condition
AIRCOND
air cooled
ACLD
air escape
AE
air header
AHDR
air scoop
AS
air shutoff
ASHOF
air shutter
AIRSHTR
air starting
ASTRG
air-break switch
ABSW
aircraft
ACFT
airframe
AFR
airport
APRT
airtight
AT
alarm
ALM
alarm check valve
ACV
alclad
ALCD
alcohol
ALC
alignment
ALIGN
alkaline
ALK
alkalinity
ALKY
all terrain vehicle
ATV
allocate
ALLOC
allowance
ALLOW
alloy
ALY
alloy steel protective plating
ASPP
alphabetical
ALPHA
alteration
ALTRN
altered
ALTRD
alternate
ALTN
alternating current
AC
alternation
ALT
alternative
ALTNV
alternator
ALTNTR
altimeter
ALTM
aluminum
AL
aluminum conductor steel reinforced
ACRS
amalgam
AMLG
ambient
AMB
amendment
AMEND
American
AMER
American Gage Design Standard
AGDS
American Standard Code for Information Interchange
ASCII
American Standard Elevator Code
ASEC
American Steel Wire Group
ASWG
American Wire Gage
AWG
ammeter
AMM
ammonia
AMNA
ammonium nitrate
AMNIT
amount
AMT
ampere
AMP
ampere hour
AMPHR
ampere hour meter
AHM
amplifier
AMPL
amplitude
AMPTD
amplitude modulation
AM
analog
ANLG
analog to digital
AD
analog to digital converter
ADC
analysis
ANAL
analyze
ANALY
anchor
ANC
anchor bolt
AB
anechoic
ANCH
angle order
ANLOR
angle stop valve
ASV
angular
ANLR
anhydrous
ANHYD
anneal
ANL
announcing
ANCG
annunciator
ANN
anode
A
anodize
ANDZ
answer
ANS
ANT
antifriction bearing
AFB
antifriction metal
AFM
antilogarithm
ANTILOG
apartment
APT
aperture
APERT
apparatus
APPAR
apparent
APRNT
appearance
APP
appendix
APPX
application
APPL
applied
APLD
applique
APLQ
approach
APRCH
approval
APPVL
approve
APPV
approved
APVD
approximate
APPROX
April
APR
aqueous
AQ
arbitrary
ARB
arc weld
ARCW
arccosecant
ARCCSE
arccosine
ARCCOS
arccotangent
ARCCOT
architectural projected window
APW
archive
ARCH
arcing
ARNG
arcsecant
ARCSEC
arcsine
ARCSIN
arctangent
ARCTAN
arithmetic
ARITH
arithmetic average
AA
arithmetic logic unit
ALU
arithmetic unit
ARITHU
armament
ARMT
armature
ARM
arrange
ARR
arrester
ARSR
arsine
ARS
article
ART
articulated
ARTCLD
artificial
ARTF
artillery
ARTY
as required
AR
as soon as possible
ASAP
asbestos
ASB
asbestos covered metal
ACM
asphalt
ASPH
asphalt plank floor
ASPHPF
asphalt roof shingles
ASPHRS
asphalt tile base
ATB
aspirator
ASPRTR
assemble
ASSEM
assembly
ASM
assembly
ASSY
assign
ASGN
assignment
ASGMT
assistance
ASSTN
assistant
ASST
associate
ASSOC
association
ASSN
assorted
ASRT
astronomical unit
AU
asymmetric
ASYM
asymptote
ASYMP
at a later date
ALD
atomic hydrogen weld
ATW
atomic weight
ATWT
atomizing
ATMG
attach
ATCH
attack
ATCK
attention
ATTN
attenuation
ATTEN
attitude
ATTD
audible
AUD
audio frequency
AF
auditor
AUDTR
augment
AGMT
August
AUG
authorize
AUTH
automatic check valve
AUTOCV
automatic phase control
APC
automatic phase lock
APL
automatic reclosing
AUTORECL
automatic starter
AUTOSTRT
automatic stop and check valve
AUTOSCV
automatic transformer
AXFMR
automatic volume control
AVC
automatic zero set
AZS
automation
AUTOMN
automobile
AUTO
automotive
AUTOM
auxiliary
AUX
auxiliary power unit
APU
auxiliary register
AUXR
auxiliary switch
ASW
auxiliary switch (breaker) normally closed
ASC
auxiliary switch (breaker) normally open
ASO
availability
AVLBL
available
AVAIL
avenue
AVE
average
AVG
average diameter
AVGDIA
aviation
AVN
avoirdupois
AVDP
awning
AWN
axial flow
AXFL
axial pitch
AXP
axial pressure angle
APA
azimuth
AZ
B
babbitt
BAB
backview
BV
backwater valve
BWV
baffle
BAF
baggage
BAG
balance
BAL
balanced line driver
BLD
balanced voltage
BALV
balancing coil
BALCL
balancing rheostat
BALRHEO
balancing set
BALS
ball stop
BSP
ballast
BLST
band elimination
BDELIM
band filter cutoff
BFCO
bandstop filter
BSFL
bandwidth
BW
barred
BRRD
barrel tile roof
BTR
barrier, waterproof
BWP
base diameter
BDIA
base helix angle
BHA
base pitch
BP
basement
BSMT
basic
BSC
basket
BSKT
battery
BTRY
bearing
BRG
before
BFR
bell crank
BELCRK
BLNG
bellmouth
BLMTH
bellows
BLWS
below
BLW
bench
BNCH
benchmark
BM
bend down
BDN
bend radius
BR
bend up
BUP
bending
BNG
bent
BT
berth
BTH
Bessemer
BESS
between
BETW
bevel
BEV
beveled wood siding
BWS
beverage
BVGE
bidirectional
BIDIR
billet steel
BLSTL
bimetallic
BMTLC
binary
BIN
binary digit
BIT
binary divide
BDV
binder
BDR
binding
BDG
binding head
BDGH
binocular
BNCLR
biological
BIOL
biological electronics
BIONICS
biology
BIO
biparting doors
BIPD
bipost
BPT
Birmingham Wire Gage
BWG
bits per inch
BPI
bits per second
BPS
bituminous
BITUM
black
BLK
black enamel slate
BES
black iron
BI
black oil finish state
BOFS
blacken
BLKN
blackening
BLKNG
blanket
BLKT
blanking
BLKG
blanking die
BLKGD
bleeder
BLDR
blend
BLN
blocking oscillator
BO
blower
BLO
blowtorch
BLWT
blue
BLU
blue indicating light
BIL
blue tool steel
BTS
board
BD
bobbin
BOB
body on chassis
BOC
boiler
BLR
boiler feed water
BFW
boiler pressure
BOPRESS
boiling
BOG
bolster
BOLS
bolted on base
BOBS
bonded
BND
bonding
BNDG
bonnet
BNT
booster
BSTR
bootstrap
BTST
bottle
BTL
bottom
BOT
bottoming
BOTMG
boundary
BDY
bracket
BRKT
braid
BRD
brake
BK
brass
BRS
brass divider strip
BDS
braze
BRZ
brazier
BRAZ
brazier head
BRAZH
brazing
BRZG
break
BRK
break jaw
BJ
breaker
BRKR
breaking
BRKG
bridge
BRDG
bright
BRT
brilliance
BRIL
Brinell hardness
BH
Brinell hardness number
BHN
British Standard
BSI
British Standard Wire Gage
SWG
British thermal unit
BTU
broach
BRCH
broadband
BRDG
brown
BRN
buckram
BUCK
buffer amplifier
BA
buffing
BFG
building
BLDG
built in
BLTIN
bulkhead
BHD
bulldozer
BDZR
bulletin
BULL
bulletproof
BPRF
bullnose
BN
bundle
BDL
buoyant
BYNT
burlap
BRLP
burner
BNR
burning
BRNG
burnish
BNSH
burster
BRSTR
bus selector
BSLR
bushel
BU
bushing
BSHG
bushing potential device
BPD
business
BUS
butane
BUTN
butt weld
BTWLD
butterfly
BTFL
button
BTN
button head
BTNHD
buzzer
BUZ
bypass
BYP
C
cable
CBL
cable television
CATV
cable termination equipment
CTE
calibration
CAL
cam timing contact
CTC
camera control unit
CCU
cannister
CSTR
capable
CPBL
capacitance
CAP
carbide steel
CS
carrier operated relay
COR
carrying
CRYG
cartridge
CRTG
casing
CSG
castellate
CSTL
casting
CSTG
category
CAT
cathode ray oscilloscope
CRO
cathode ray tube
CRT
caution
CAUT
Celsius
C
center tap
CT
C to C
centerline
CL
central processing equipment
CPE
central processing unit
CPU
ceramic tile base
CTB
change in design
CID
chrome vanadium
CRVAN
chromium plate
CRPL
chronometer
CRNMTR
circuit switching unit
CSU
circulating water pump
CWP
coarse
CRS
coated
CTD
coating
CTG
cold drawn copper
CDC
cold water
CW
color code
CC
combining
COMB
commercial and government entity code
CAGE
commission
COMSN
communication and data
C&D
communications satellite
COMSAT
compact disk
CD
comparator buffer
CB
compatible single side band
CSSB
compiler
COMP
compressor
COMPR
computer-aided design
CAD
computer-aided manufacturing
CAM
concentric
CONC
concession
CON
concrete splash block
CSB
concurrent
CNCR
condition
COND
conference
CONF
conical
CONL
connection
CONN
consecutive
CONSEC
console
CSL
constant current transformer
CCT
constant output amplifier
COA
constant speed drive
CSD
contact
CONT
contact potential difference
CPD
continental horsepower
CONTHP
continued
CONTD
control power switch
CSW
control read only memory
CROM
control shift register
CSR
control transmitter
CX
controlled rectifier
CR
convection
CONVN
convector
CONVR
convergence
CONVG
corrosion
CRSN
corrosive
CRSV
corrugated wire glass
CWG
cosecant
CSC
countersink
CSK
countersink other side
CSKO
countersunk head
CSKH
cradle
CRDL
crankshaft
CSHAFT
crash position indicator
CPI
crimp
CRP
cross bracing
XBRA
cross connection
XCO
cross connection
XCONN
cross country
XCY
cross point
XPT
cross section
XSECT
crossarm
XARM
crossbar
XBAR
crossbar tandem
XBT
crosshair
XHAIR
crossing
crosshead
CRSHD
crossover
CRSVR
cruising
CRUIS
cryogenics
CRYOG
cryptography
CRYPTO
crystal
XTAL
crystal oscillator
XTLO
crystalline
CRYST
cubic feet per minute
CFM
cubic feet per second
CFS
curve
CRV
cushing
CSHG
cyanide
CYN
cycle
CY
cylinder
CYL
D
damper
DMPR
damping
DPG
dated
DTD
datum
DAT
daughterboard
DTRBD
deaerating
DEARTG
dealer
DLR
decelerate
DCLR
decibel
DB
decimal
DEC
decision
DECN
declutch
DCLU
decode
DCD
decoder
DCDR
decompression
DECOMPN
decontamination
DECONTN
decrease
DECR
decrement
DECRT
dedendum
DED
deep drawn
DD
defective
DEF
deflating
DFL
deflect
DEFL
defrost
DRF
degaussing
DEGUSG
degree
DEG
dehydrator
DYHR
delay
DLY
delete
DELE
delineation
DEL
delivery
DLVY
deluxe
DLX
demagnetize
DMGZ
demodulator
DEMOD
demodulator band filter
DBF
demolition
DML
denatured
DNTRD
denote
DEN
density
DENS
dental
DNTL
department
DEPT
deposit
DEP
depot installed
DEPINST
depression
DEPR
depth
D
depth
DP
derivative
DERIV
derrick
DRK
describe
DESCR
description
DESCP
desiccant
DSCC
design
DSGN
design specification
DSPEC
designation
DES
DESTN
destructive readout
DRO
destructor
DESTR
detached
DTCH
detail
DET
detent
DTT
determination
DETN
develop
DVL
developed length
DEVLG
development
DEV
deviation
DEVN
device
DVC
dial indicating
DLINDG
dial lock
DLOCK
diameter bolt circle
DBC
diamond
DMD
diamond pyramid hardness
DPH
diazo print
DPR
diesel
DSL
diesel belt drive
DBD
diesel engine
DENG
diesel mechanical
DM
diesel oil
DO
diethanolamine
DEA
differential thermocouple voltmeter
DTVM
digital analog converter
DAC
digital block AND OR gate
DBAO
digital to analog
DA
digital voltmeter
DVM
dimmer
DMR
diode resistor transistor logic
DRTL
diode transistor logic
DTL
dipstick
DPSK
direct current
DC
direct drive
DDR
direct memory access
DMA
directly
DRCTY
disable
DSBL
discontinue
DSCONT
discrete Fourier transform
DFT
discriminator
DSCRM
disengaging
DSENGA
disk operating system
DOS
dispenser
DISP
dispensing
DSPNSG
display
DSPL
disposition
DISPN
distance
DIST
distance measuring equipment
DME
distill
DSTL
distillate
DISTLT
distilled water
DW
distinguish
DISTING
distortion
DISTN
distress
DTRS
distribution amplifier
DAMP
distribution panel
DPNL
distributor
DISTR
dither
DTER
diver
DVR
diverter
DIV
do not use
DNU
docking
DCKG
document
DOC
does not apply
DNA
domestic
DOM
door closer
DCL
door stop
DST
door switch
DSW
Doppler velocity and position
DOVAP
dots per inch
DPI
double
DBL
double acting
DBLACT
double acting door
DAD
double based solid propellant
DBSP
double end
DE
double extra strong
XXSTR
double face
DBLF
double pole back connected
DPBC
double pole double throw
DPDT
double pole double throw switch
DPDTSW
double pole front connected
DPFC
double pole single throw
DPST
double pole single throw switch
DPSTSW
double pole switch
DPSW
double secondary current transformer
DSCT
double side band
DSB
double sided
DS
double single sideband
DSSB
double throw
DT
double wall
DBLW
double wall fiberboard
DWLFBD
doubler
DBLR
dovetail
DVTL
dowel
DWL
down
DN
downdraft
DNDFT
dozen
DOZ
drafting
DFTG
drafting machine
DFMACH
draw bar pull
DBP
drawer
DWR
drawing
DWG
drawing change notice
DCN
drawn
DWN
dredger
DRGR
dressed (lumber)
DRS
dresser
DRSR
dressing
DRSG
drill
DR
drill jig
DJ
drive fit
DF
drive unit
DRU
driver
DRVR
drop manhole
DMH
drop wood siding
DWS
dry chemical
DCHEM
dry pipe valve
DPV
drying
DYG
dual speed drive
DSD
dull black finish slate
DBFS
dummy
DUM
dumping
DMPG
duplex
DX
damping
DPG
duplexer
DPLXR
duplicate
DUP
duty cycle
DTYCY
dwelling
DWEL
dynamic
DYN
dynamometer
DYNMT
dynamotor
DYNM
E
each
EA
each way
EW
ebony asbestos
EBASB
eccentric
ECC
economize
ECON
edge thickness
ET
edgewise
EDGW
education
EDUC
effective
EFF
effective focal length
EFFL
ejection
EJN
EJCTR
elastic
ELAS
elbow
ELB
electric
ELEC
electric contact
ELCTC
electric contact ring
ELCTRG
electric contact brush
ELCTCBR
electric discharge tube
EDT
electric dynamometer
EDYNMT
electric motor driven
EMD
electric water cooler
EWC
electrical discharge machining
EDM
electrical metallic tubing
EMT
electrical resistance
ER
electrical specification
ESPEC
electrical time, superquick
ETSQ
electrocardiogram
ECG
electrode
ELCTD
electrohydraulic
ELHYD
electrolyte
ELCTLT
electromagnetic
EM
electromechanical
ELMCH
electromotive force
EMF
electron
ELCTRN
electron coupled oscillator
ECO
electron type semiconductor material
N
electronic control
ELECTC
electronic standard
ESTD
electronic switching
ES
electronic voltmeter
EVN
electronic voltohmmeter
EVOM
electronically operated valve
ELV
electronics
ELEX
electronics switching system
ESS
electronik
ELEK
electropneumatic
ELPNEU
electrostatic discharge
ESD
electrostatic discharge resistive
ESOS
element
ELEM
electrostatic discharge sensitive
ESDS
elevate
ELEV
elevation
EL
eliminate
ELIM
elliptical
ELP
elliptical head
ELPH
elongate
ELNG
emboss
EMB
emergency power supply
EMPS
emission
EMSN
emitter
E
emitter
EMTR
emitter coupled logic
ECL
empennage
EMP
employee
EMPL
emulator
EMU
emulsion
EMUL
enable
ENBL
enamel
ENAM
encapsulation
ENCAP
enclose
ENCL
encode
ENCD
encoder
ENCDR
end cell switch
ECSW
end half
EHF
end to end
EE
endless tangent screw
ETS
endstone
ESTN
engine drive
ED
engineering change notice
ECN
engineering change proposal
ECP
engineering change request
ECR
engineering field change
EFC
engineering release notice
ERN
engineering support activity
ESA
engineering work order
EWO
equivalent focal length
EQFL
equivalent series resistance
ESR
erased
ERS
erecting
ERCG
erector
ERCR
escape
ESC
especially
ESP
estimate
EST
estimated completion date
ECD
et cetera
ETC
evacuate
EVAC
evaluate
EVAL
evaluation
EVLTN
evaporate
EVAP
ever lock
EVRLK
examination
EXAM
excavate
EXC
excessive
EXCSV
exchange
EXCH
exciter
EXCTR
exclusive
EXCL
execute
EXEC
exercise
EXER
exhaust
EXH
exhaust gas temperature
EGT
exhaust vent
EXHV
existing
EXST
exit guide vane
EGV
expand
EXP
expanded binary coded decimal interchange
EBCDIC
expansion joint
EXPJT
expedite
EXPED
expendable
EXPEN
experimental testing
X
explanation
EXPL
explode
EXPLD
explosion
EXPLN
explosive
XPL
explotation
EXPLTN
exponent
EXPNT
exposure
EXPSR
extender
EXTND
extension
EXT
extra
EX
extra fine
EF
extra heavy
XHVY
extra long wheel base
XLWB
extra strong
XSTR
extraordinary wave
XWAVE
extracting
EXTG
extreme
EXTM
extremely low frequency
ELF
extrude
EXTR
eyelet
EYLT
eyepiece
EYPC
F
fabricate
FAB
face width
FW
faceplate
FP
facility
FACIL
facing
FCG
facsimile
FAX
factor
FAC
factory
FCTY
Fahrenheit
F
failure
FLR
failure rate
FR
fairing
FAIR
FAM
fan in
FNI
fan out
FNO
far side
FS
fast operate (relay)
FO
fast time constant
FTC
fastener
FSTNR
fault
FLT
fault isolation test
FIT
feasible
FSBL
February
FEB
Federal
FED
Federal Stock Number
FSN
Federal Supply Catalog Identification List
FSCIL
Federal Supply Code for Manufacturers
FSCM
feedback
FDBK
feedback potentiometer
FPOT
feedback resistance
FBR
feeder
FDR
feedwater
FDW
feedwater pump
FWP
feeler
FELR
female pipe thread
FPT
female
FEM
female flared
FFL
female thread
FTHRD
ferrule contact
FERCON
fiberboard
FBRBD
fiberboard, corrugated
FBDC
fiberboard, double wall
FDWL
fiberboard, solid
FBDS
fibrous
FBRS
field
FLD
field decelerator
FDE
field discharge
FDI
field dynamic braking
FDB
field effect transistor
FET
field force, decreasing
FFD
field force, increasing
FFI
field manual
FM
field service modification work order
FSMWO
field switch
FSW
field weakening
FWK
figure
FIG
filament center tap
FCT
filament ground
FG
file finish
FF
file support equipment
FSE
fillet
FIL
filling
FILL
fillister head
FILH
film processing
FLMPRS
film sound
FLMSD
filter
FL
filter
FLTR
final assembly
FA
finger
FGR
finish
FNSH
finish all over
FAO
finish one side
F1S
finish two sides
F2S
fire alarm bell
FABL
fire control system
FCS
fire extinguisher
FEXT
fire hose
FH
fire hose cabinet
FHC
fire hose rack
FHR
fire hydrant
FHY
fire resistant
FRES
fire room
FRM
firebrick
FBCK
fireplug
FPL
fireproof
FPRF
firmware
FMW
first in first out
FIFO
first reduction 1
RED
first stage 1
STG
fiscal year
FY
fission
FSSN
fitted
FTD
fitting
FTG
fixed
FXD
fixed autotransformer
FATR
fixed point
FXP
fixture
FXTR
flagstone
FLGSTN
flame
FLM
flame resistant
FLMRES
flame tight
FLMTT
flameproof
FLMPRF
flammable
FLMB
flange
FLG
flapper
FLPR
flared
FLRD
flared tube fitting
FTF
flared tube fitting gasket seal
FTFGS
flaring
FLRG
flashless
FLHLS
flash welding
FLW
flat bar
FB
flat fillister head
FFILH
flat nose
FN
flat trim template
FTT
flat work
FLWK
flathead
FLH
flatten
FLN
flexible
FLEX
flip-flop complementary
FFC
floating
FLTG
floating point instruction set
FIS
flood light
FLDT
flooding
FLDNG
flotation
FLOT
flow rate
FLRT
flow switch
FLSW
fluid flow
FDFL
fluid pressure line
FDPL
fluked
FLKD
fluorescent
FLUOR
flurry
FLRY
flush metal threshold
FMT
flush mount
FLMT
flush threshold
FT
flush type
FLTP
flush valve
FV
fluted
FLTD
fluted socket
FLUSOC
fluted socket head
FLUSOCH
flutter
FLUT
flyweight
FLYWT
flywheel
FLYWHL
focal
FOC
foggy
FGY
folding
FLDG
follow
FOL
follow up
FLWP
foot per second
FPS
food service
FDSVC
foot board
FBM
foot per minute
FPM
foot-pound force
FTLB
for example
EG
forced draft
FD
FGD
forged steel
FST
forging
FORG
forked
FKD
forman
FMAN
formation
FORM
former
FRMR
formula translation
FORTRAN
forward
FWD
foundation
FDN
foundry
FDRY
four conductor
4/C
four dimensional
4D
four pole
4P
four pole double throw switch
4PDTSW
four pole single throw switch
4PSTSW
four pole switch
4PSW
four stage
4STG
four way
4WAY
four wire
4W
foyer
FOY
fractional
FRAC
fragment
FRAG
framework
FRWK
free cutting brass
FCB
free height
FRHGT
free machining steel
FMS
freeboard
FREEBD
freezer
FRZR
freight
FRT
french fry
FRFY
frequency
FREQ
fresh water drain collecting tank
FWDCT
friction
FRICT
fringe
FRNG
from below
FRBEL
front connection
FC
front end
FRTN
front of board
FOB
front upset jaw
FUJ
fuel air ratio
FARATIO
fuel indicator reading
FIR
fuel injection pump
FIP
fuel oil pump
FOP
fuel tank
FTK
fuel transfer pump
FTP
fueling
FLNG
fulcrum
FUL
full dog point
FDP
full indicator movement
FIM
full load
FLLD
full load amperes
FLA
full scale
FSC
fully heat treated
FHT
function
FCTN
fundamental
FUND
funnel
FUNL
furnish
FURN
fuse
FZ
fuse box
FUBX
fuse holder
FUHLR
fuselage
FUSLG
future
FUT
G
gage
GA
gage board
GABD
gage code number
GCN
gain time control
GTC
gallery
GALL
galley
GALY
gallon
GAL
gallons per minute
GPM
gallons per second
GPS
galvanize
GALV
galvanized steel
GALVS
galvanized steel wire rope
GSWR
galvannealed
GALVND
galvanometer
GALVNM
gang punch
GP
garage
GAR
garbage
GBG
garbage in garbage out
GIGO
garboard
GARBD
gas operated
GOPR
gas turbine
GTRB
gas weld
GASW
gas, nonpersistent
GNP
gaseous mixture
GM
gaseous oxygen
GOX
gasket
GSKT
gasoline
GAS
gasoline engine
GENG
gasproof
GPF
gastight
GT
gate
G
gate turnoff
GTO
gate valve
GTV
galvanized iron
GALVI
gear rack
GRK
gear shaft
GRSHFT
gearbox
GRBX
gearcase
GRC
gearing
GRG
general
GENL
general contractor
GENCONT
general note
GN
general plan equipment requirement
GPER
generation
GEN
generator field
GFLD
geological
GEOL
geomagnetism
GEOMAG
geometry
GMTRY
German silver
GSIL
gimbal
GMBL
glass
GL
glass block
GLB
glaze
GLZ
glazed all tile base
GWTB
glazed facing unit
GFU
glazed structural facing unit
GSFU
glazed structural unit base
GSUB
glazed structural units
GSU
glazed wall tile
GWT
glazed wallboard
GLWB
glide slope
GLS
glider
GLI
globe stop valve
GSV
globe valve
GLV
glossary
GLOSS
glow plug
GLPG
glycerin
GLYCN
gold
GLD
governing
GOVG
government
GOVT
Government Industry Data Exchange Program
GIDEP
governor
GOV
grab rod
GR
gradient
GRAD
granite
GRAN
grommet
GROM
granolithic base
GRB
granolithic finished floor
GFF
granulated
GNLTD
graphic
GRPH
graphic kilovolt ampere meter
graphic varmeter
GRVA
graphite
GPH
grater
GRTR
grating
GRTG
gravel
GVL
gravel surface buildup roof
GSBR
gray
GRA
gray
GY
gray iron
GI
grease
GRS
grease nozzle
GNOZ
greatest common divisor
GCD
green
GRN
green indicating lamp
GIL
Greenwich mean time
GMT
grind
GRD
groove
GRV
grooved
GRVD
groover
GRVR
grooving
GRVG
gross combined weight rating
GCWR
gross vehicle weight
GVW
gross weight
GRWT
ground
GND
ground fault interrupter
GFI
ground glass
GGL
grown junction
GJ
guarantee
GUAR
guard rail
GDR
guidance
GDNC
guide
GDE
gunmetal
GMET
gusset
GUS
gutter
GUT
gymnasium
GYM
gypsum
GYP
gypsum plaster ceiling
GPC
gypsum plaster wall
GPW
gypsum sheathing board
GSB
gypsum wallboard
GWB
gyrocompass
GCMPS
gyroscope
GYRO
H
half dog point
1/2DP
half hard
1/2H
half round
1/2RD
hammer
HMR
hand control
HNDCONT
hand rail
HNDRL
hand reset
HNDRST
handbook
HDBK
handhold
HH
handicap
HDCP
handle
HDL
handling
HDLG
handling room
HR
handshake
HDSHK
handwheel
HNDWL
hanger
HGR
hanging
HNG
hard chromium
HDCR
hard disk
HD
hard drawn
HDDRN
harden
HDN
harden and grind
HG
hardness
HDNS
hardness assurance
HA
hardness critical item
HCI
hardness critical process
HCP
hardware
HDW
hardware cloth
HDWC
hardwood
HDWD
harmonic
HMNC
harness
HARN
hatch
H
haversine
HAV
hazardous
HAZ
head crank
HC
header
HDR
heading
HDG
headless
HDLS
headlining
HLNG
headquarters
HQ
headset
HDST
heat exchange
HE
heat resisting
HTRES
heat shield
HTSHLD
heat sink
HTSK
heat treat
HTTR
heated
HTD
heater
HTR
heating
HTG
heavy
HVY
height
HGT
height by width by length
HXWXL
helical
HLCL
helical compression
HLCPS
helical extension
HLEXT
helicopter
HLCPTR
helipotentiometer
HPOT
helix angle
HLXA
helper
HLP
herringbone
HGBN
hertz
Hz
heterodyne
HET
heavy machine gun
HMG
hexagon
HEX
hexagonal head
HEXHD
hexagonal socket
HEXSOC
hexagonal socket head
HEXSOCH
high altitude platform
HAP
high carbon steel
HCS
high carbon steel, heat treated
HCSHT
high fidelity
HFI
high frequency
HF
high frequency oscillator
HFO
high grade plow steel
HGPS
high humidity
HIHUM
high intensity
HINT
high level language
HLL
high point
HPT
high potential
HIPOT
high potential test
HIPOTT
high pressure steam
HPS
high speed radar
HSR
high speed steel
HSS
high temperature
HTM
high tensile
HTNSL
high tensile cast iron
HTCI
high tensile strength
HTS
high tension
HT
high voltage
HV
high voltage regulator
HVR
high-frequency current
HFCUR
highpass filter
HPFL
highway
HWY
hinge jaw
HJ
hinge pillar
HPLR
hoist
HST
holddown
HLDN
holder
HLDR
holding
HLDG
hollow
HOL
homing
HOM
HFMF
honeycomb
HNYCMB
honorary
HON
hookup
HKP
hopper
HPR
horizon
HRZN
horizontal
HORIZ
horizontal center of gravity
HCG
horizontal centerline
HCL
horizontal impulse
HZMP
horizontal impulse reaction
HIR
horizontal reaction
HZRN
horizontal reference line
HRL
horizontal volute spring suspension
HVSS
horn gap switch
HGSW
horsepower
HP
horsepower hour
HPHR
hose connector
HCONN
hose thread
HSTH
hospital
HOSP
hot brine pump
HBPUMP
hot galvanize
HGALV
hot leg
HLG
hot rolled pickled and oiled
HRPO
hot rolled steel
HRS
hot side
HSD
hot water heater
HWH
hot water, circulating
HWC
house
HSE
household
HSHLD
housing
HSG
hovering
HVRNG
howitzer
HOW
humid
HMD
hunting
HNTG
hybrid
HYB
hydrated
HYDTD
hydraulic
HYDR
hydrocyanic acid
HCN
hydroelectric
HYDRELC
hydro-form dye
HFD
hydrogen ion concentration
pH
hydrometer
HYDM
hydrophone
HYPH
hydrostatic
HYDRST
hyperbola
HYPERB
hyperbolic sine
SINH
hyperbolic tangent
TANH
hyperfine structure
HFS
hypergolic clean
HGC
hypotenuse
HYP
I
ideal lowpass filter
ILPFL
identification
IDENT
idler
IDL
ignition
IGN
current source
IGEN
ignitor
IGNTR
illuminate
ILLUM
illustrate
ILLUS
illustrated parts breakdown
IPB
illustrated parts catalog
IPC
imaginary
IMAG
imitation
IMIT
immediate
IMMED
immersion
IMRS
impact
IMP
impedance
IMPD
impedor
IMPR
impeller
IMPLR
imperfect
IMPF
imperial
IMPRL
impingement
IGMT
implement
IMPL
impose
IMPS
impression
IMPRSN
improved plow steel
IMPPS
improvement
IMPROV
impregnate
IMPRG
impulse
IMPLS
impulse conductor
IC
in accordance with
IAW
inboard
INBD
incandescent
INCAND
incendiary
INCND
inch
IN
inch-pound
INLB
incinerator
INCIN
inclined
INCLN
inclosure
INCLS
include
INCL
incoherent
INCOH
incoming
INCM
incomplete
INCOMP
incomplete sequence (relay)
IS
incorporated
INC
incorrect
INCOR
increase
INCR
incubator
INCBR
indent
INDT
indentured parts list
IPL
independent
INDEP
indeterminate
INDET
index
IDX
indicate
IND
indicator transmitter
INDTR
indirectly
IDRTY
individually
INDV
inductance
L
inductance capacitance
LC
inductance capacitance resistance
LCR
inductance regulator
INDREG
induction compass
ICMPS
inductor
IDCTR
inductosyn
ISYN
industrial
INDL
inert
INRT
inert gas
INRTG
inertial
INRTL
inertial guidance
IG
inertial measurement unit
IMU
infinite
INF
inflatable
IFL
information
INFO
ingot
IGT
inhibit
INHB
initial
INIT
initial velocity
IV
inject
INJ
inlet
INL
inner
INR
inner back end
IBE
inner bottom
IB
inner front end
IFE
inoperative
INOP
inorganic
INORG
input
INP
input output
IO
input output buffer
IOB
input output element
IOE
input output register
IOR
input translator
INXLTR
inquiry
INQ
inscription
INSC
insecticide
ICTDC
INSEP
insert
INSR
insert screw thread
INST
inside
INS
inside frosted
IF
inside mold line
IML
inside of metal
IM
inside radius
IR
inside trim template
ITT
insignia
ISGN
insoluble
INSOL
inspect
INSP
inspection check fixture
ICF
inspection check template
ICT
install
INSTL
installer
INSTLR
instantaneous automatic gain control
IAGC
instantaneous automatic volume control
IAVC
instantaneous overload
IOL
instantaneous relay
INSTRLY
instruct
INSTR
instrumentation
INSTM
insufficient
INSUF
insulate
INSUL
insulated gate field effect transistor
IGFET
intake
INTK
integral
INT
integrating
INTEG
intelligence
INTEL
intensity
INTEN
intercept
INTCP
interchangeable
INTCHG
interchanger
INTCHGR
intercommunication
ICM
intercommunication
INTERCOM
interconnection
INTCON
intercooler
INCLR
intercylinder
INTCYL
interface
INTFC
interface control drawing
ICD
interference
INFRN
interference
INTRF
interior
INTR
interlock
INTLK
intermediate
INTMD
intermediate power amplifier
IPA
intermittent
INTMT
intermittent duty
IDTY
intermodulation distortion
IMD
internal
INTL
internal combustion engine
ICE
internal pipe thread
IPT
International Annealed Copper Standard
IACS
International Organization for Standardization
ISO
International Pipe Standard
IPS
International Standard Thread (metric)
IST
interphase transformer
INTPHTR
interpolation
INTRPL
interpole
INTPO
interpret
INTPR
interrogate
INTRG
interrupt
INTRPT
interrupted continuous wave
ICW
intersect
INTSCT
intership
INTSHP
interstage
INTSTG
interval
INTVL
intervalometer
INTVLM
intricate
INTRC
intrinsic i-type semiconductor material
I
introduction
INTRO
invariant
INVAR
inventory
INVN
inverse
INVS
inverse time limit
ITL
inverse time relay
ITR
invert
INVT
inverter
INV
involute
INVLT
inward
INWD
ionosphere
IONO
iron core reactor
ICR
iron pipe
IP
irregular
IRREG
isolate
ISOL
isolation
ISLN
isosceles
ISOS
issue
ISS
J
jacket
JKT
jacket water
JW
jackscrew
JKSCR
jamming
JAMG
January
JAN
japanned
JAP
jet propelled
JP
jettison
JTSN
job order
JO
joggle
JOG
joiner
J
joint
JT
joint bar
JTB
joint compound
JC
journal
JNL
July
JUL
junction
JCT
junction box
JB
junction field effect transistor
JFET
June
JUN
junior
JR
K
cathode
K
Kalamein
KAL
Kalamein door
KALD
Kalamein door and frame
KDF
keene cement plaster
KCB
keene cement plaster ceiling
KCPC
keeping
KPG
kerosene
KRSN
key locker
KL
key pulsing
KPLS
keyboard
KYBD
keypunch
KP
keyseat
KST
keyway
KWY
kick plate
KPL
kickoff (relay)
KO
kiln dried
KD
kilovolt ampere hour
KVAH
kilovolt ampere hour meter
KVAHM
kilovolt ampere meter
KVAM
kilowatt hour meter
KWHM
kinescope
KINE
kinetic energy
KE
knee brace
KB
knife blade
KNBL
knife edge
KNED
knife switch
KNSW
Koroseal
KRAL
LBL
laboratory
LAB
labyrinth
LBYR
labyrinth pack
LBYRPK
lacquer
LAQ
ladder
LAD
lagging
LAG
lampholder
LPHLDR
laminate
LAM
lampblack
LMPBLK
landing
LDG
landmark
LDMK
lantern
LTRN
lanyard
LNYD
lapping
LPG
large
LGE
last in first out
LIFO
latch
LCH
lateral
LATL
latitude
LAT
lattice
LTC
launch
LANH
launcher
LCHR
laundry
LAU
lavatory
LAV
layer
LYR
layout
LYT
lead angle
LA
lead coated metal
LCM
leader
LDR
leading edge radius
LER
leakoff
LOFF
least material condition
LMC
leather
LTHR
leaves
LVS
left bank
LBK
left hand
LH
left hand drive
LHDR
left hand side
LHS
left male
LM
left–right indicator
LRI
left side
LS
length
LG
length between perpendiculars
LBP
length of curve
LCRV
length of lead (actual)
LOL
length overall
LOA
length to diameter ratio
LGC
lengthening
LNG
letter
LTR
level
LVL
lever
LVR
library
LBRY
license
LIC
lifesaving
LSVG
lift up door
LUD
lifting
LFT
lifting eye
LE
light
LT
light activated semiconductor controlled rectifier
LASCR
light amplification (by) stimulated emission (of) radiation
LASER
light emitting diode
LED
light switch
LTSW
light tank
LTTK
lighter than air
LTA
lighting
LTG
lightproof louver
LPL
lightproof shade
LPS
lightproof vent
LPTR
lightweight concrete
LWC
lighweight insulating concrete
LWIC
lignum vitae
LGNMVTE
limit
LIM
limit switch
LIMSW
limited
LTD
limiting
LMTG
limiter
LMTR
line drawing
LD
line of sight
LOS
linear
LIN
linkage
LKGE
linoleum
LINOL
lintel
LNTL
liquid
LIQ
liquid fuel
LIQFL
liquid in glass
LQGLS
liquid oxygen
LOX
liquid rocket engine
LRE
liquor
LQR
lithograph
LITHO
litter
LIT
lizard
LIZ
load inducing relay
LIRLY
load limiting resistor
LLRES
load ratio control
LRC
load resistor (relay)
LR
load shifting ratio
LSR
load update subset
LUS
load waterline
LWL
local
LCL
local apparent time
LAPT
local area network
LAN
local oscillator
LO
local sidereal time
LSDT
local standard time
LST
localizer
LOC
locate
LCT
lock pillar
LPLR
lock washer
LKWASH
locked
LKD
locked closed
LKDC
locked in device
LID
locked open
LKDO
locked rotor
LKROT
locker
LKR
locking
LKG
locknut
LKNT
lockscrew
LKSCR
locksmith
LSMITH
lockup
LKUP
lockwire
LKWR
locomotive
LOCO
logarithm
LOG
logarithm, natural
LN
logarithmic amplifier
LOAMP
logic
LGC
logic unit
LU
long side
LSD
long taper
LTPR
long wheelbase
LWB
longeron
LONGN
longitude
LONG
longitudinal expansion joint
LEJ
longleaf yellow pine
LLYP
loop control (relay)
LPC
looper
LPR
louvered door
LVD
low alloy steel
LS
low coolant
LCOLNT
low frequency
LF
low frequency oscillator
LFO
low level
LL
LLL
low pass
LP
low power output
LPO
low speed
LSP
low stream
LSTM
low temperature
LTEMPT
low torque
LTQ
low voltage
LV
low voltage protection
LVP
lower
LWR
lower deck
LDK
lower sideband
LSB
lowest
LWST
lowest usable frequency
LUF
lowest usable high frequency
LUHF
lowpass filter
LPFL
lubricant
LUBT
lubricate
LUB
lubricating oil
LUBO
lubricating oil pump
LOP
lumber
LBR
lumens per watt
LPW
luminous
LUM
lunar orbit rendezvous
LOR
M
machine
MACH
machine screw
MSCR
machine steel
MST
machined surface
MASU
machinery
MCHRY
machinist
MCHST
magnesium thorium
MAGTHOR
magnetic
MAG
magnetic amplifier
MAGAMP
magnetic modulator
MAGMOD
magnetic particle inspection
MPI
magneto
MGN
magnetohydrodynamics
MHD
magnetometer
MGTMTR
magnetomotive force
MMF
magnetron
MAGN
magnitude
MAGTD
magnify
MGF
mahogany
MAH
mainframe
MNFRM
maintenance
MAINT
maintenance and repair
MR
maintenance parts kit
MPK
maintenance parts list
MPL
major
MAJ
makeup
MKUP
makeup feed
MUFD
male and female
MF
male flared
MFLRD
male pipe thread
MPT
male thread
MTHRD
malfunction
MALF
malleable
MAL
malleable iron
MI
management
MGT
manager
MGR
managing
MNG
mandrel
MDRL
manhole
MH
manifold
MANF
manual
MNL
manual change order
MCO
manual change request
MCR
manual gain control
MGC
manual overload
MANOVLD
manual volume control
MVC
manually operated
MNLOPR
manufacture
MFR
manufactured
MFD
manufacturing
MFG
manuscript
MS
maneuvering
MANUV
marble base
MRB
marble floor
MRF
marble threshold
MRT
March
MAR
margin
MARG
marginal (relay)
MGL
marked
MKD
marker
MKR
markings
MKGS
masking
MASK
masonry
MSNRY
master oscillator power amplifier
MOPA
master switch
MSW
mastic
MSTC
mastic joint
MJ
matched
MTCHD
material
MATL
material test specification
MTS
mathematical
MATH
matrix
MAT
matrix output amplifier
MOA
maximum
MAX
maximum capacity
MAXCAP
maximum material condition
MMC
maximum permissible exposure
MPE
maximum working pressure
MWP
maximum working voltage
MWV
mean aerodynamic chord
MAC
mean effective pressure
MEP
mean time between failures
MTBF
mean time to failure
MTTF
mean time to first failure
MTTFF
mean time to repair
MTTR
mean variation
MV
mean width ratio
MWR
measure
MEAS
mechanical
MECH
mechanize
MECZ
median
MDN
medical
MED
medium
MDM
medium high frequency
MHF
medium pressure
MP
megabyte
MEG
melamine
MEL
member
MBR
membrane
MEMB
memorandum
MEMO
memory
MEM
merchandise
MDSE
merchantable
MERCH
mercurial
MRCL
meridian
MER
meshing
MSHG
message
MSG
message generator
MSGG
messenger
MESS
metal
MET
metal anchor
MA
metal anchor slots
MAS
metal awning type window
MATW
metal base
METB
metal casement window
MCW
metal clad switch gear
MCSWGR
metal corner bead
MCB
metal covered door
MCD
metal curb
METC
metal door
METD
metal flashing
METF
METG
metal interface amplifier
MIA
metal lath and plaster
MLP
metal mold
METM
metal mount
MMT
metal oxide semiconductor
MOS
metal oxide semiconductor field effect transistor
MOSFET
metal oxide semiconductor transistor
MOST
metal partition
METP
metal rolling door
MRD
metal roof
METR
metal strip
METS
metal thick oxide silicon
MTOS
metal through wall flashing
MTWF
metallic
MTLC
metallize
MTLZ
meter
M
meter
MTR
meter kilogram second
MKS
meteorological
METRL
method
MTHD
mezzanine
MEZZ
microammeter
MCAM
microcomputer
MCMPTR
microcurrent
MCKT
microelectronics
MELEC
microelement
MELEM
microfunctional circuit
MFC
micrometer
MIC
microminiature
MMIN
microprocessor
MIPRCS
microscope
MICR
microwave early warning
MEW
middle
MDL
midget
MDGT
miles per gallon
MPG
miles per hour
MPH
military
MIL
military standard
MIL-STD
milliammeter
MAM
mineral
MNRL
mineral surface roof
MSR
miniature
MINTR
minimum
MIN
minimum discernible signal
MDS
mirror
MIR
miscellaneous
MISC
missile
MSL
miter
MIT
miter end
ME
mixing
MXG
mixing flow
MXFL
mixture
MXT
mobile
MBL
mode transducer
MXDCR
model
MOD
modification work order
MWO
modulator demodulator
MODEM
moisture
MSTRE
mold line
ML
molded
MLD
molding
MLDG
molecular weight
MOLWT
molecule
MOL
momentary
MOM
monitor
MON
monograph
MONOG
monophonic
MONO
Montana
MT
month
MO
mooring
MRG
mop rack
MOPR
most significant bit
MSB
mostly
MSLY
motherboard
MTHBD
motion
MTN
motor
MOT
motor belt drive
MBD
motor can
MOCAN
motor circuit switch
MCSW
motor direct
MD
motor direct connected
MDC
motor V-belt
MVB
motorcycle
MC
motorized
MTZ
mounted
MTC
mounting
MTG
mounting center
MTGC
movable
MVBL
movement
MVT
moving
MVG
muffler
MUF
multifrequency pulsing
MFP
multigage
MG
multilith
MULTH
multimeter
MULTR
multiplane
MLTPL
multiple
MULT
multiple unit
MU
multiplex
MUX
multispeed
MLTSP
munitions
MUN
music wire
MUW
music wire gage
MWG
muzzle
MZL
N
nacelle
NAC
name plate
NPL
namely
VIZ
narrow
NAR
narrow band
NB
narrow gage
NG
national
NATL
National coarse thread
NC
National Electrical Code
NEC
National Electrical Code Standards
NECS
National Electrical Safety Code
NESC
National extra fine thread
NEF
National fine thread
NF
National gas outlet thread
NGO
National pipe thread
NP
national stock number
NSN
National taper pipe thread
NPT
National Wire Gage
NWG
natural
NAT
natural black slate
NBS
nautical
NAUT
nautical mile
NMI
naval
NAV
naval bronze
NAVBRZ
Navy Primary Standards
NPS
Navy Secondary Standards
NSS
navy standard flange
NFL
needle
NDL
negative
NEG
negative positive intrinsic negative
NPIN
negative positive negative positive
NPNP
negative positive negative transistor
NPN
negative temperature coefficient
NTC
neon indicating light
NEIL
neoprene
NPRN
NTWT
network
NTWK
neutral
NEUT
neutron
NTN
next higher assembly
NHA
nickel
NKL
nickel copper
NICOP
nickel copper alloy
NCA
nickel silver
NISIL
nickel steel
NS
nipple
NIP
nitride steel
NITSTL
no drawing
ND
no load
NLD
no voltage release
NVR
noise generator
NGEN
no lead
NL
nomenclature
NOMEN
nominal
NOM
noncombustible
NCOMBLE
noncorrosive metal
NCM
noncoupled
NCPLD
nondestructive evaluation
NDE
nondestructive inspection
NDI
nondestructive readout
NDRO
nondestructive testing
NDT
nonelectric
NELEC
nonenclosure
NENCL
nonflammable
NFLMB
nonfused
NFSD
nonhygroscopic
NH
nonlinear
NLNR
nonmetallic
NM
nonoscillating
NOSC
nonpetroleum
NPET
locknut pipe thread
NPSL
straight thread pipe couplings
NPSC
tight joints
NPTF
taper pipe thread railing fixtures
NPTR
thread for press-tight joins
NPSF
nonreactive relay
NR
nonreinforced concrete pipe
NRCP
nonreversible
NRVSBL
nonself
NSLF
nonslip thread
NST
nonstandard
NONSTD
nonsynchronous
NONSYN
nontight
NT
normal
NORM
normal charge
NLCHG
normal circular pitch
NCP
normal diametral pitch
NDP
normal overload
NOL
normal pressure angle
NPA
normal temperature and pressure
NTP
normally open
NO
not applicable
NA
not in contact
NIC
not to scale
NTS
notched
NCH
notice of revision
NOR
November
NOV
nozzle
NOZ
nuclear
NUC
numeral
NUM
nut plate
NTPL
nylon
NYL
O
object
OBJ
objective
OBJV
oblique
OBL
obscure
OB
observation
OBSV
obsolete
OBS
obstruction
OBSTN
obverse
OBV
occupy
OCC
octahedral
OCTAHDR
October
OCT
odometer
ODOM
of true position
OTP
office
OFC
officer
OFCR
official
OFCL
offset
OFS
ohmmeter
OHM
oil circuit breaker
OCB
oil cleaner
OCLNR
oil cooled
OCLD
oil cooler
OCLR
oil dipstick
ODPSK
oil filter
OFL
oil immersed
OI
oil level
OLVL
oil nozzle
ONOZ
oil pan
OPN
oil plug
OPLG
oil pressure
OPRS
oil pump
OP
oil ring
OR
oil seal
OSL
oil switch
OS
oiltight
OT
on center
OC
one stage
OSTG
one way
OW
opaque
OPA
open close open
OCO
open end
OE
open hearth
OH
open jointed
OJ
open type control circuit contacts
OTCCC
opening
OPNG
openside
OPSD
operate
OPR
operational
OPNL
opposite
OPP
optical character recognition
OCR
optimum
OPT
optimum working frequency
OWF
optional
OPTL
orange
O
orange
ORN
orange indicating light
OIL
order
ORD
organization
ORG
orientation
ORIENT
orifice
ORF
origin
ORIG
original equipment manufacturer
OEM
oscillating
OSCG
oscillator
OSC
oscillogram
OSCGRM
oscilloscope
SCOPE
other design activity
ODA
ounce
OZ
ounce-inch
OZIN
ouside helix angle
OHA
out to out
OO
outerback end
OBE
outlet
OUT
output transistor
OUTXLTR
outside diameter
OD
outside diameter tube
ODT
OF
outside mold line
OML
outside screw and yoke
OSY
outside trim template
OTT
oval head
OVH
oval point
OVP
overall
OA
overflow
OVFL
overfrequency relay
OFR
overhanging
OVHG
overhaul
OVHL
overhead
OVHD
overload
OVLD
overload relay
ORLY
overpower
OVPWR
override
OVRD
oversize
OVS
overspeed
OVSP
overtravel
OVTR
overvoltage
OVV
oxide
OXD
oxygen
OXY
P
package
PKG
padder capacitor
PAD
paint
PNT
painted
PTD
pallet
PLL
pan head
PNH
panel
PNL
panic bolt
PANB
panoramic
PAN
paper
PPR
parabola
PRB
parabolic
PRBLC
paraboloid
PRBD
parachute
PRCHT
paragraph
PARA
parallax
PRX
parallel
PRL
parameter
PRMTR
parametric amplifier
PARAMP
parchment
PCHT
parenthesis
PAREN
parity bit
PBIT
parkerized
PARK
parking
PRKG
parkway
PKWY
part identification number
PIN
part number
PN
part of
PO
partial
PART
partition
PTN
partly
PTLY
parts kit
PRTKT
party
PTY
passenger
PASS
passivate
PSV
passive
PSIV
paste
PST
patent
PAT
patent pending
PATPEND
pattern
PATT
peak inverse (reverse) voltage
PRV
pedestal
PED
pencil
PCL
pendent
PEND
pendular
PNDLR
penetrate
PEN
pentaerythryte tetranitrate
PETN
pentagon
PNTGN
pentode
PENT
percent
PCT
percussion
PERC
perforate
PERF
performance
PRFM
performance evaluation and review technique
PERT
Performance Operational Maintenance Site
POMSEE
perimeter acquisition radar
PACR
periodic
PERD
peripheral
PRPHL
peripheral command indicator
PCI
periscope
PERIS
permanent
PERM
permeability
PERMB
perpendicular
PERP
person
PER
personnel
PERS
perspective
PERSP
petroleum
PETRO
pewter
PWTR
phantom
PHM
pharmacy
PHAR
phase
PH
phase shift
PSH
phase shift driver
PSHD
phenoic
PHEN
Phillips head
PHH
phonograph
PHONO
phosphor bronze
PHBRZ
phosphorescent
PHOS
photocopy
PHOC
photodiode
PDIO
photoelectric
PELEC
photoelectric cell
PEC
photograph
PHOTO
phototransistor
PXSTR
physical
PHYS
physiological
PHYSIOL
pickup
PU
picture
PIX
piece mark
PCMK
pierce
PRC
pierced aluminum plank
PAP
pierced steel plank
PSP
pigment
PGMT
pigtail
PGT
piling
PLG
pillow block
PLBLK
pilot
PLT
pilot light
PLTLT
pinion end
PE
pintle
PTL
pioneer
PION
pipe plug
PPG
pipe rail
PR
pipe sleeve
PSL
pipe tap
PT
pipeline
PPLN
pipette
PPE
piping
PP
pistol
PSTL
piston
PSTN
pitch diameter
PD
pivot
PVT
places
PL
plain washer
PW
planar
PLNR
planar epitaxial passivated transistor
PEP
plane
PLN
planet
PLNT
planetary
PLNTY
plank
PLK
planning
PLNG
PLQ
plaster
PLAS
plastic
PLSTC
plate glass
PLGL
plated
PLD
platform
PLATF
plating
PLTG
pliers
PLR
plotting
PLOT
plow steel rope
PSR
plumbing
PLMB
plunger
PLGR
plus or minus
PORM
pneumatic
PNEU
pnpn transistor magnetic logic
PTML
PKT
point of compound curve
PCC
point of intersection
PI
polarity
PLRT
polish
POL
polyester
POLYEST
polyethylene
POLTHN
polyethylene insulated conductor
PIC
polystyrene
PS
polytetrafluorethylene
PTFE
polyvinyl chloride
PVC
pontoon
PON
popping
POP
porcelain
PORC
porro
POR
port side light
PSLT
portable
PORT
position
POSN
positioner
PSNR
positive
POS
positive displacement
PDISPL
positive negative intrinsic positive
PNIP
positive negative positive negative
PNPN
positive negative positive transistor
PNP
post indicator valve
PIV
potable water
POTW
potential
POT
potential switch
PSW
pound
LB
pound force foot
LBFT
pound force inch
LBIN
pound force per square foot
PSF
pound force per square inch
PSI
pound per cubic foot
PCF
pound per horsepower
PHP
powder
PDR
powder
PWD
power
PWR
power amplifier
PA
power circuit breaker
PCB
power control unit
PCU
power driven
PDVN
power factor
PF
power supply
PWRSPLY
power supply unit
PSU
power switchboard
PSWDB
power takeoff
PTO
powerhouse
PWRH
practice
PRAC
preamplifier
PREAMP
prebent
PRBNT
precast
PRCST
precedence
PREC
precharge
PRCH
precipitate
PPT
precipitation
PRECP
precipitin
PRCPTN
precision
PRCN
prefabricated
PREFAB
preference
PREF
preferred
PFD
prefocus
PRFCS
preformed
PREFMD
preformed beam
PFB
preheat
PHT
preheater
PHR
preinserted
PINSTD
preliminary
PRELIM
premium
PREM
premolded
PRMLD
premolded expansion joint
PEJ
preparation
PREP
prescription
PRESCR
present
PRES
preservation
PSVTN
preservative
PSVTV
press
PRS
press fit
PRFT
pressboard
PBD
pressed
PRSD
pressed metal
PRSDMET
presser
PRSR
pressure
PRESS
pressure gage
PG
pressure vessel
PV
pressurize
PRSRZ
prevent
PVNT
previous
PREV
primary
PRI
Primary Coolant System
PCS
prime
PRM
prime mover
PMVR
primer
PRMR
priming
PRM
printed circuit
PC
printed wiring assembly
PWA
printed wiring board
PWB
printer
PTR
printing
PRNTG
printout
PTOUT
prism
PSM
private automatic branch exchange
PABX
probability
PROB
procedure
PROC
process
PRCS
processing
PRCSG
processing unit
PROCU
procurement
PRCMT
production
PROD
program
PRGM
program register
PRGMRGTR
programmable logic array
PLA
programmable logic controller
PLC
programmable unijunction transistor
PUJT
programming
PRGMG
progress
PROG
project
PROJ
projectile
PJCTL
projection
PJCTN
projector
PJTR
proof
PRF
proofread
PRFRD
propane
PRPN
propellant
PRPLT
propeller
PROP
proportion
PROPN
PRPSL
proposed
PRPSD
propulsion
PRPLN
prosthetic
PRSTC
protect
PTCT
protection
PROT
protective device
PROTDEV
prototype
PROTO
protractor
PROTR
provision
PROV
proximity
PROX
p-type hole semi-conductor material
P
publication
PUBN
pull button
PLB
pull button switch
PBSW
pull rod
PLRD
pulley
PUL
pulsation
PLSN
pulsator
PLSR
pulse
PLS
pulse amplitude modulation
PAM
pulse code modulation
PCM
pulse count modulation
PCTM
pulse duration modulation
PDM
pulse frequency modulation
PFM
pulse interval modulation
PIM
pulse per minute
PPM1N
pulse position modulation
PPM
pulse time modulation
PTM
pulse time multiplex
PTMUX
pulse width modulation
PWM
pulverizer
PULV
pump discharge
PDISCH
punch
PCH
punching
PCHG
purchase
PURCH
purge
PRG
purging
PRNG
purification
PRFCN
purifier
PUR
purple indicating light
PIL
push button
PB
push pull plate
PPP
push rod
PRD
pyrogen unit
PYGN
pyrometer
PYROM
pyrotechnic
PYRO
Q
quadrangle
QUAD
quadrant
QDRNT
quadrature
QDRTR
quadruple
QUADR
qualified products list
QPL
quality
QUAL
quality assurance
QA
quality conformance inspection
QCI
quality control
QC
quantitative
QUANT
quantity
QTY
quantum amplification stimulated emission
QUASER
quarry
QRY
quarry tile base
QTB
quart
QT
quarter
QTF
quarter hard
QTH
quarter hard
1/4H
quarter phase
QTRPH
quarter phase
1/4PH
quarter round
QTRRD
quarter round
1/4RD
quartz
QTZ
quaternary
QUAT
question
QUEST
quick break
QB
quick disconnect
QDISC
quick firing
QF
quick opening device
QOD
quiescent
QUIES
quintuple
QUIN
quotation
QUOT
R
rabbet
RAB
rachet
RCHT
radial
RDL
radiated emission
RE
radiation
RADN
radiator
RDTR
radio detection and ranging
RADAR
radio direction finding
RDF
radio frequency
RF
radio frequency choke
RFC
radio frequency interference
RFI
radio inertial
RIN
radio telegraph
RTLG
radio telephony
RTEL
radio teletype
RTT
radioactive
RAACT
radioactive liquid waste
RALW
radius
RAD
railcar
RLCR
railing
RLG
railroad
RR
railway
RY
raised
RSD
raised face diameter
RFD
raised face height
RFH
ramjet
RMJ
random
RNDM
random access memory
RAM
range
RNG
rating
RTG
rattail
RTTL
raw material
RM
rayon
RYN
reacting volt ampere meter
RVA
reaction
RCTN
reactivate
REACTVT
reactive
REAC
reactive factor meter
RFM
reactive voltmeter
RVM
reactor core
RCO
read write
RW
reader
RDR
reading
RDNG
readout
RDOUT
ready
RDY
real time
RT
real time input output transducer
RIOT
reamer
RMR
rebabbit
RBBT
recall
RCL
receive
RCV
received
RCVD
receiver
RCVR
receiving
RCVG
receptacle
RCPT
reception
RCPTN
recess
REC
recharger
RECHRG
reciprocate
RECIP
recirculate
RECIRC
reclaiming
RCLMG
RCLD
reclose
RECL
recognition
RECOG
recoilless
RCLS
recommend
RECM
recompression
RCMPRS
recondense
RECOND
recondition
RCNDT
reconnaissance
RECON
record
RCD
record and report
RAR
recording ammeter
RAMM
recording demand meter
RDM
recording kilovolt ampere meter
RKVAM
recording tachometer
RTM
recording varmeter
RVARM
recoverability
RECY
recovery
RCVY
recreation
RCN
rectangle
RECT
recurrent
RCUR
red fuming nitric acid
RFNA
red indicating lamp
RIL
redesignate
REDSG
reduce
RDC
reducer
RDCR
reduction
RDCN
reduction of area
RA
reentry
REY
refacer
RECR
reference
REF
reference designation
REFDES
reference line
REFL
refined
RFND
reflected
REFLD
reflective insulation
Rl
reflex
RFLX
refractory
RFRC
refrigerant
RFGT
refrigerate
REFR
regardless of feature size
RFS
regenerate
REGEN
register
RGTR
register drive
RD
regular
RGLR
regulate
RGLT
regulator
RGLTR
reheater
RHR
Reid vapor pressure
RVP
reinforce
REINF
reinforced concrete culvert pipe
RCCP
reinforced concrete pipe
RCP
reject
REL
relate
RLT
relation
RLTN
relaxation
RLXN
relay
RLY
relay block
RB
reliability
RELBL
relief
RLF
relief valve
RV
relieve
RLV
relocated
RELOC
remote
RMT
remote control system
RCS
remove
RMV
removable
REM
renewable
RNWBL
repair
RPR
repeat
RPT
repeater
RPTR
repeating coil
RPTC
repeller
RPLR
repetition
RPTN
replace
REPL
replenishing
RPLNG
replenishment
RPNSM
report
RPRT
reproduce
REPRO
reproducer
RPDR
reproducing unit
RU
republic
REPB
repulsion
RPLSN
request
REQ
request for price quotation
RPQ
required
REQD
requirement
REQT
requisition
REQN
rescind
RESC
rescue
RSQ
rescue boat
RSQB
research and development
R&D
reserve
RSV
reserve feed water
RFW
reservoir
RSVR
residual
RESID
residual field
RESFLD
resiliant
RESIL
resistance
R
resistance capacitance
RC
resistance capacitance coupled
RCCPLD
resistance inductance
RL
resistance inductance capacitance
RLC
resistor
RES
resistor capacitor transistor logic
RCTL
resistor transistor logic
RTL
resolution
RESOLN
resolver
RSLVR
resonant
RESN
respective
RSPV
respectively
RESP
respirator
RSPTR
respond
RSPD
response
RSPS
restore
RST
restorer
RESTR
restrict
RSTR
retain
RET
retainer
RTNR
retard
RTD
retardation coil
RTDC
retension
RETNN
reticle
RTCL
reticulated grating
RG
retract
RETR
retrieve
RTRV
retroactive
RETRO
retrogressive
RETROG
return
RTN
return head
RHD
return to zero
RZ
reverberation control of gain
RCG
reverse
RVS
reverse acting
RACT
reverse current
REVCUR
reversible
RVSBL
revision
REV
revolution indicating system
RIS
revolutions per minute
RPM
revolutions per second
RPS
revolve
RVLV
rewind
RWND
rheostat
RHEO
RHOD
rhombic
RHOMB
ribbed
RIB
ribbon
RBN
ridge
RDG
rigging
RGNG
right angle
RTANG
right hand drive
RHDR
right hand side
RHS
right side
RS
rigid
RGD
ring counter
RCNTR
rivet
RVT
roasting
RSTG
rocker
RKR
rocker arm
RKRA
rocket
RKT
Rockwell hardness
RH
rod control
RCONT
rod drive
RDDR
Roebling Wire Gage
RWG
rolled
RLD
roller
RLR
roofing
RFG
root mean square
RMS
root sum square
RSS
rotary
RTRY
rotate
ROT
rotator
ROTR
rotometer
ROTOMT
rotor
RTR
rough
RGH
rough opening
RO
round
RND
round head
RDH
round trips per hour
RTPH
route
RTE
routine
ROUT
rubber
RBR
rubber insulation
RINSUL
rubber tile floor
RTF
rudder
RUD
runway
RWY
rust preventive
RPVNTV
rustproof
RSTPF
S
saddle
SDL
safe operating area
SOAR
safe practice data sheet
SPDS
safe working pressure
SWP
safety
SAF
safety valve
SV
salinity
SAL
salvage
SALV
same size
SS
sampling
SMPLG
sandblast
SDBL
sanitary
SAN
saponify
SAPON
satellite
SATL
saturate
SAT
sawtooth
ST
Saybolt Furol second
SSF
Saybolt Universal second
SSU
scale
SC
scale model
SCMOD
scanning
SCNG
scanning electron microscope
SEM
scattered
SCTD
scavenge
SCAV
schedule
SCHED
schematic
SCHEM
science
SCI
scintillator
SCINT
scleroscope
SCLER
scooter
SCTR
scope
SCP
scraper
SRPR
screen door
SCD
screw
SCR
screw down
SCRDN
screwdriver
SCDR
sealed
SLD
seamless
SMLS
seamless steel tubing
SSTU
secant, hyperbolic
SECH
second
SEC
section
SECT
sector
SCTR
sector scan indicator
SSI
securing
SECRG
security
SCTY
sedan
SED
segment
SEG
select
SEL
self-cleaning
SLFCLN
self-closing
SELFCL
self-contained
SCNTN
self-destroying
SD
self-locking
SLFLKG
self-propelled
SELFPROP
self-sealing
SLFSE
self-tapping
SLFTPG
selsyn
SELS
semiconductor
SEMICOND
semiconductor controlled switch
SCS
semiconductor unilateral switch
SUS
semiconductor bilateral switch
SBS
semifireproof
SFPRF
semifixed
SFXD
semiflush
SFLS
semaphore
SMPHR
semitrailer
STLR
sender
SDR
sending
SNDG
sense
SEN
sense amplifier
SA
sensitive
SENS
sensitized
SNTZD
sensitizing
SNTZG
sensor
SNSR
separate
SEP
sequence
SEQ
sequential coding
SECO
serial
SER
serial number
SERNO
serrate
SERR
server
SVR
service
SVCE
service bulletin
SB
service ceiling
SRVCLG
service factor amperes
SFA
serving
SERG
servomechanism
SERVO
servomotor
SVTR
set screw
SSCR
setter
SETR
setting
SET
settling
SETLG
sewage
SEW
sexless (connector)
SXL
sextant
SXTN
sextuple
SXT
shaft
SFT
shaft extension
SFTEXT
shaft gear
shank
SHK
shape
SHP
sharpener
SHRP
shearing
SHRNG
sheathing
SHTHG
sheave
SHV
sheet
SH
shell
SHL
shield
SHLD
shift
SHF
shipment
SHPT
shipping
SHPNG
shipping center
SHCR
shock absorber
SHABS
shop replaceable unit
SRU
short circuit
SHORT
short leaf yellow pine
SLYP
short taper
STPR
short time constant
SHTC
short wheelbase
SWB
shot blast
SHBL
shoulder
SHLDR
shower and toilet
SHT
shown
SHN
shrapnel
SHRAP
shredder
SHRDR
shroud
SHRD
shroud fin
SHRDF
shunt trip
SHTR
shut down
SHTDN
shut off valve
SOV
shuttle
SHTL
side light
SILT
siding
SDG
signal
SIG
signal to noise ratio
SNR
signaling
SNLG
silencing
SILG
silicomanganese steel
SMS
silicon precision alloy transistor
SPAT
silicon unilateral diffused transistor
SUDT
silver
SIL
silver brazing union
SBU
silver solder
SILS
similar
SIM
sine
SIN
single
SGL
single base solid propellant
SBSP
single beam klystron
SBK
single conductor
IC
single conductor cable
SCC
single cylinder
SCYL
single end
SE
single face
SIF
single feeder
SFDR
single groove insulation
SG
single groove single petticoat insulation
SGSP
single pole
SP
single pole double throw
SPDT
single pole double throw switch
SPDTSW
single side band
SSB
single sideboard
SSBD
single signal
SSIG
single swing blocking oscillator
SSBO
sinter
SNTR
situation
SIT
sketch
SK
skirted
SKD
skylight
SLT
slate shingle roof
SSR
sleeve
SLV
sleeving
SLVG
slice
SLC
sliding
SL
sliding expansion joint
SEJ
slinger
SLGR
slip joint
SJ
slope
SLP
slotted
SLTD
slow speed
SLSP
sludge
SLG
small
SM
smooth face structural clay tile
SFSCT
smooth neck
SMNK
smooth surface built up roof
SSBR
snatch
SNH
snubber
SNBR
socket
SLK
socket head
SCH
socket welding
SWLDG
soda fountain
SDFTN
software
SFW
soil stack
SSK
solder
SLDR
solenoid
SOL
solenoid valve
SOLV
solid fiberboard
SFB
solid height
SOLHGT
solid neutral
SN
soluble
SLBL
solution
SOLN
solvent
SLVT
sound
SND
sound navigation and ranging
SONAR
sound recorder reproducer
SRR
soundproof
SNDPRF
source
SCE
source control drawing
SOCD
source control number
SOCN
spacer
SPCR
special
SPCL
special treatment steel
STS
specific gravity
SPGR
specification
SPEC
speedometer
SPDOM
speed converter
SPCONV
spider
SPDR
spooling
SPG
spot face
SF
spot face other side
SFO
sprayed acoustical ceiling
SAC
stabilization
STBLN
stabilize
STAB
stabilized local oscillator
STALO
stabilized meter oscillator
STAMO
stabilized shunt
STSH
stable
STB
stainless
STNLS
stainless steel
SST
stairway
STWY
stamp
STP
stanchion
STAN
standard
STD
standard intruction set
SIS
standard military drawing
SMD
standardization
STDZN
standby
STBY
standoff
STDF
starboard
STBD
start and stop
STSP
starter
START
STG
statement
STMT
station
STA
stator
STTR
statuary bronze
STBRZ
status
STAT
steady
STDY
steam generator
STGEN
steam working pressure
STWP
steaming
STMG
steel
STL
steel basement window
SBW
steel cadmium plated
SCDP
stellite
STLT
stepdown
STPDN
stepdown and stepup
SDNSU
stepup
STU
stereophonic
STEREO
sterilizer
STER
stiffener
STIF
stimulate
STML
stirrup
STIR
stitch
STC
stock
STK
stock number
SNO
stock order
SO
stoke
STRK
stone
STN
storage
STOR
storage address register
SAR
storeroom
STRM
stormwater
STW
stowage
STWG
straight
STR
straight line frequency
SLF
straight line wavelength
SLWL
strand
STRD
strapped
STRP
strategic
STRAT
stratosphere
STRATO
streamline
STRLN
stringer
STGR
stripped
STPD
stroboscope
STBSCP
strong
STRG
strongback
STRBK
structural
STRL
structural carbon steel hard
SCSH
structural carbon steel medium
SCSM
structural carbon steel soft
SCSS
structural clay tile
SCT
structure
STRUCT
stuffing
STFG
subassembly
SUBASSY
subcaliber
SUBCAL
subject
SUBJ
submarine
SUB
submerged
SUBMG
submersible
SBM
subminiature
SUBMIN
subsequent
SUBQ
subsoil drain
SSD
substation
SUBSTA
substitute
SUBST
substrate
SBSTR
substructure
SUBSTR
succeeding
SUC
suction
SUCT
sufficient
SUF
suffix
SUFF
summary
SMY
summing
SUM
sump tank
SMTK
sunny
SNY
supercharge
SPCHG
superheater
SUPHTR
superheterodyne
SUPERHET
superimposed current
SUPCUR
superintendent
SUPT
supersede
SUPSD
supersensitive
SUPSENS
superstructure
SUPERSTR
supervise
SUPV
supplement
SUPPL
suppression
SUPPR
surface
SURF
surface four sides
S4S
surface one side
S1S
surface one side and one edge
S1SE
surface two sides
S2S
surgical
SURG
survey
SURV
survival
SRVL
suspend
SUSP
suspended acoustical plaster ceiling
SAPC
suspended acoustical tile ceiling
SATC
suspended plaster ceiling
SPC
suspended sprayed acoustical ceiling
SSAC
sustaining
STNG
sweat
SWT
swinging bracket
SWGBKT
swinging door
SWGD
switch
SW
switch gear
SWGR
switch stand
SWS
switchboard
SWBD
switchgear block
SGB
switchover
SWOV
swivel
SWVL
symbol
SYM
symmetrical
SYMM
symposium
SYMP
synchro switch
SSW
synchro tie
SYNTI
synchronize
SYNC
synchronous
SYN
synthetic
SYNTH
system
SYS
Système International d’Unités
SI
T
table lookup
TLU
table solution
TABSOL
tables of equipment
TE
tabulate
TAB
tabulator simulator
TABSYM
tachometer
TACH
tachometer voltmeter
TVM
tackle
TKL
tactical
TAC
tally
TLY
tandem
TDM
tangent
TAM
tanker
TKR
taper
TPR
taper shank
TS
tappet
TPT
tapping
TPG
technical bulletin
TB
technical note
TN
technical report
TR
technical
TECH
teeth
T
telecommunications
TELECOM
TLM
telemeter transmitter
TMX
telemetry
TLMY
telephone
TEL
telephone booth
TELB
telescope
TLSCP
television
TV
television interference
TVI
temper
TEM
temperature
TEMP
temperature differential
TD
temperature indicating controlling
TIC
temperature meter
TM
temperature switch
TSW
tempered
TMPD
tempering
TMPRG
template
TEMPL
tensile
TNSL
tension
TNSN
tentative
TNTV
terminal
TERM
terminal block
TBLK
terminal protective device
TPD
terneplate
TRPL
terohmmeter
TOHM
tertiary
TER
test equipment
TSTEQ
test link
TLK
test specification
TSPEC
tester
TSTR
testing
TSTG
testing and popping
TSPOP
tetrachloride
TET
tetrofluorethylene
TETFLEYNE
textile
TXTL
that is
IE
theoretical
THEOR
theoretical point of fog
TPF
therm
THM
thermal
THRM
thermal converter
THC
thermal demand transmitter
TDX
thermistor
THMS
thermoid
TH
thermometer
THERM
thermostat
THERMO
thermostatic
THRMSTC
thick
THK
thick film
THKF
thickener
THKNR
thicker
THKR
thickness
THKNS
thimble
TMB
thin film
TF
thin film transistor
TFT
thinner
TNR
thread
THD
thread
TRD
thread both ends
TBE
thread cutting
TC
thread one end
TOE
threaded neck
THDNK
threaded piece
THDPC
three conductor
3C
three phase
3PH
three pole
3P
three pole double throw
3PDT
three pole double throw switch
3PDTSW
three pole single throw
3PST
three way
3WAY
three wire
3W
throat
THRT
throttle
THROT
through
THRU
thrower
THWR
throwout
THWT
thrust
THR
thrust line
TL
thyristor
THYR
ticket
TKT
tightening
TTNG
tile shingle roof
TSR
tiller
TLR
tilting
TLG
timber
TMBR
timed
TMD
time delay closing
TDC
time delay opening
TDO
time meter
TIM
time of flight
TMFL
time opening
TO
time since new
TSN
time since overhaul
TSO
timer
TMR
timing
TMG
tinned
TND
tobin bronze
TOBBRZ
toboggan
TOB
toggle
TGL
tolerance
TOL
tone and alarm
TNALM
tongue
TNG
tongueless
TGLS
top and bottom bolt
TBB
top of frame
TFR
topping
TOPG
torpedo
TORP
torpedo battery
TBATT
torque
TRQ
torque differential receiver
TDR
torquemeter
TORM
torsion
TRSN
torsional
TORNL
total
TOT
total dynamic head
TDH
total indicator reading
TIR
total load
TLLD
total time
TT
totalize
TOTLZ
totalizing relay
TOR
tower
TWR
tracer
TRCR
tracking
TRKG
trade name
TRN
traffic
TRFC
trailer
TRLR
trailing
TRG
trainer
TRNR
trajectory
TRAJ
transparent
TRANS
transceiver
XCVR
transducer
XDCR
transcribe
TRSCB
transcriber
TRSBR
transcribing
TRSBG
transfer
XFR
transformer
XFMR
translator
XLTR
transmission
XMSN
transmit
XMT
transmittal
XMTL
transmitted
XMTD
transmitter XMTR
transferred electronic logic
TEDL
TDCM
transistor-transistor logic
TTL
transistor under test
TUT
transistorized
TSTRZ
transition
TRNSN
transmit gain control
TGC
transportation
TRANSP
transpose
TRNPS
transposition
TPSN
transverse
TRANSV
transverse expansion joint
TEJ
trapezoid
TRAP
travel limit
TRVLMT
traveler
TRVLR
traveling
TRVLG
traveling wave tube
TWT
traversing
TRAV
treated
TRTD
treated hard pressed fiberboard
THPFB
treatment
TRTMT
treble
TRB
triangle
TRNGL
tributary
TRIB
trick wheel
TRKWHL
trigger
TRIG
trim after forming
TAF
trimmer
TRMR
trinitrotoluene
TNT
triode
TRI
triple
TPL
triple throw
3T
triple wall
TPLW
triplex
TRX
tripped
TRP
trolley
TRLY
troposphere
TROPO
throttle reset
TRST
truck
TRK
true airspeed
TAS
true position
TP
true position tolerance
TPTOL
truncated Whitworth coarse thread
TWC
truncated Whitworth fine thread
TWF
truncated Whitworth special thread
TWS
trunnion
TRUN
truss head
TRH
tubing
TBG
tune controlled gain
TCG
tuned plate tuned grid
TPTG
tuned radio frequency
TRF
tungsten
TUNG
tuning
TUN
tunnel
TNL
tunnel diode
TNLDIO
tunnel diode logic
TDL
turbine
TURB
turnbuckle
TRNBKL
turned
TRND
turning
TURN
turning gear
TRNGR
turning light
TRNLT
turntable
TRNTBL
turret
TUR
twin sideband
TWSB
twist drill gage
TDG
twisted
TW
twisted pair
TWPR
two conductor
2C
two digit
2DIG
two phase
2PH
two stage
2STG
two way
2WAY
two wire
2W
type mode series
TMS
type plate
TYPL
typesetting
TYPSTG
typesetting lead
TSL
typical
TYP
U
ultimate
ULT
ultrahigh frequency
UHF
ultrasonic frequency
UF
ultraviolet
UV
unbleached
UBL
unbleached muslin
UMUS
unclamp
UNCLP
undefined
UNDEF
under
UND
undercurrent
UNDC
underfrequency
UNDF
underfrequency relay
UFR
underground
UGND
underheat
UHT
underload
UNDVD
undersize
US
undervoltage
UNDV
undervoltage device
UVD
underwater
UWTR
underwater battery
UB
undetermined
UNDETM
unfinished
UNFIN
unglazed ceramic mosaic tile
UCMT
unified
UN
Unified coarse thread
UNC
Unified extra fine thread
UNEF
Unified fine thread
UNF
Unified sideband
USB
Unified special thread
UNS
uniform
UNIF
unijunction transistor
UJT
uninterruptible power supply
UPS
union bonnet
UNB
unit check
UK
unit heater
UH
unit under test
UUT
unit weight
UWT
United States gage
USG
universal
UNIV
universal product code
UPC
universal time coordinated
UTC
unknown
UNK
unless otherwise specified
UOS
unlimited
UNLIM
unloading
UNL
unlocking
UNLKG
unmarked
UNMKD
unmounted
UNMTD
unregulated
UNRGLTD
unsensitized
USTZD
unsuppressed
UNSUPPR
until cooler
UC
untreated
UTRTD
untreated hard pressed fiberboard
UHPFB
untwist
UNTW
updraft
UPDFT
upper
UPR
upper and lower
UL
upper control limit
UCL
upright
URT
upward
UPWD
USA standard
USAS
UAR
used on
UO
used with
UW
utensil
UTN
utility
UTIL
V
vacuum
VAC
vacuum induction melt vacuum arc remelt
VIMVAR
vacuum tube
VT
vacuum tube voltmeter
VTVM
value
VAL
value engineering
VE
valve
V
valve box
VB
valve seat
VST
valve stem
VSTM
vane axial
VNXL
vaporize
VPR
vaporproof
VAPPRF
var hour meter
VARHM
varactor
VRCTR
variable
VAR
variable floating point
VFLPT
variable frequency
VF
variable frequency clock
VFREQCLK
variable frequency oscillator
VFO
variable gain amplifier
VGA
variable resistor
VARISTOR
variable threshold logic
VTL
variable voltage transformer
VARITRAN
varistor
VRIS
varmeter
VARM
varnish
VARN
varying
VRYG
vegetable
VEG
vehicle
VEH
velocity
VEL
vendor item control drawing
VICD
vent pipe
VP
ventilate
VENT
verbatim
VERB
verification
VERIF
verify
VRFY
vernier
VERN
versatile
VERST
versed sine
VERS
versus
VS
vertex
VTX
vertical
VERT
vertical center of buoyancy
VCB
vertical center of gravity
VCG
vertical centerline
VCL
vertical centrifugal
VCE
vertical impulse
VIMP
vertical ladder
VL
vertical radius
VTR
vertical reference line
VRL
vertical volute spring suspension
VVSS
very high frequency
VHF
very high frequency direction finding
VHFDF
very high frequency omnidirectional radio
VOR
very high frequency omnirange localizer
VORLOC
very large scale integration
VLSI
very long range
VLR
very low altitude
VLA
very low frequency
VLF
vestibule
VEST
vestigial sideband
VSB
vestigial sideband modulation
VSM
vibrate
VIB
Vickers hardness
VH
video
VID
video amplifier
VIDAMP
video display terminal
VDT
video frequency
VIDF
video integration
VINT
village
VIL
violet
VIO
viscometer
VISMR
viscosity index
VI
visible
VSBL
visual
VIS
visual flight rules
VFR
visual glide slope
VGS
vital load center
VLC
vitreous
VIT
voice
VO
voice coil
VC
voice operated transmitter keyer
VOX
volatile organic compound
VOC
volt ohm milliammeter
VOM
volt per mil
VMIL
voltage adjusting rheostat
VADJR
voltage control transfer
VCT
voltage controlled oscillator
VCO
voltage detector
VDET
voltage drop
VD
voltage regulator
VR
voltage relay
VRLY
voltage standing wave ratio
VSWR
voltage tunable magnetron
VTN
voltage variable capacitor
VVC
voltammeter
VAM
voltmeter
VM
volume
VOL
volume unit
VU
volumetric
VLMTRC
volute
VLT
vulcanize
VULC
W
wafer
WFR
wagon
WAG
waiting
WTG
wake light
WKLT
wall receptacle
WR
wallboard
WLB
walseal
WLSL
wardrobe
WRB
warehouse
WHSE
warning
WRN
warping
WKPU
warranty
WARR
wash fountain
WF
Washburn and Moen Gage
WMGA
washer
WSHR
washing
WSHG
water
WTR
water chiller
WCHR
water closet
WC
water cooled
WCLD
water cooler
WCR
water jacket
WJ
water pump
WP
water turbine
WTURB
waterproof
WTRPRF
waterproof shroud
WPS
waterproofing
WPG
watertight
WTRTT
waterwheel
WWHL
watt demand meter
WDM
watthour
WH
WHDM
watthour meter
WHM
watthour meter with contact device
WHC
wattmeter
WM
wavelength
WL
weakened plane joint
WPJ
weapon
WPN
weather
WEA
weather seal
WSL
weather stripping
WS
weatherproof
WTHPRF
weathertight
WEAT
webbing
WBG
week
WK
weight
WT
welded
WLD
welder
WLDR
weldless
WLDS
West
W
wheel
WHL
wheelbase
WB
whistle
WSTL
white
WHT
white indicating lamp
WIL
white scale
WHS
width
WD
width across flats
WAF
winch
WN
wind direction
WDIR
winder
WNDR
winding
WDG
windlass
WNDLS
window
WDO
window unit
WU
windshield
WSHLD
wire assembly
WA
wire bound
WBD
wire gage
WG
wire glass
WGL
wire wound
WW
wiring
WRG
with blowout
WBL
without
WO
without blowout
WOBO
wood awning type window
WATW
wood block floor
WBF
wood boring
WDBOR
wood casement window
WCW
wood cutting
WCTG
wood furring strips
WFS
wood panel
WDP
wood shingle roof
WSR
wooden box
WBX
Woodruff
WDF
working pressure
WPR
working steam pressure
WSP
working voltage
WV
workshop
WKS
worm gear
WMGR
worm shaft
WMSFT
worm wheel
WMWHL
wound
WND
wrecker
WRK
wringer
WRGR
wrist pin
WSTPN
wrong direction
WRDIR
wrought
WRT
wrought brass
WBRS
wrought iron
WI
Y
yard
YD
year
YR
yellow
Y
yellow indicating lamp
YIL
yellow light
YLT
yellow varnished cambric
YVC
yield point
YP
yield strength
YS
Z
zero adjusted
ZA
zero temperature coefficient
ZTC