Abbreviation
N--Indicates an added item not included in
Explanation
cnx
convex
previous publications.
cres
corrosion resistant steel
C--Indicates a change in data.
cross-rec
F--Indicates a change in FSN only.
carrying
cryg
cskh
countersunk head
b. To maintain disassembly sequence in this
ctr
center
manual, a sequence number in parentheses will
cup point
cup-pt
be displayed immediately to the right of the
db
double bottom
double
dbl
call-out number on the illustration.
diameter
dia
electrical
elec
5. How to locate Repair Parts.
elf
ext
external
a. When Federal Stock number or reference
fbr
number is unknown:
flat
fl
(1) First. Using the table of contents de-
flange
flg
termine the assembly group, within which the
finish
fnsh
focal
foc
repair part belongs. This is necessary since il-
flat point
fp
lustrations are prepared for assembly groups and
glass
gl
listings are divided into the same groups.
high
h
hex-sot
hexagonal socket
(2) Second. Find the illustration covering
inside diameter
id
the assembly group to which the repair part
internal
intl
belongs.
l
long
(3) Third. Identify the repair part on the
no
number
ns
national special
illustration and note the illustration figure and
nylon
nyl
item number of the repair part.
outside diameter
od
(4) Fourth. Using the Repair Parts List-
overall
oa
plate
ing, find the assembly group to which the repair
pl
plated
pld
part belongs and locate the illustration figure
plastic
plstc
and item number noted on the illustration.
passivate
psvt
rubber
rbr
b. When Federal Stock Number or reference
steel cadmium plated
scdp
number is known:
sft
shaft
(1) First. Using the Index of Federal Stock
stl
steel
str
straight
Numbers and Reference Numbers find the per-
synthetic
synth
tinent Federal stock number or reference num-
tongue
tng
ber. This index is in ascending FSN sequence
taper
tpr
followed by a list of reference numbers in as-
unified coarse thread
unc
cending alpha-numeric sequence, cross-referenced
wide
W
to the illustration figure number and item num-
7. Federal Supply Codes for Manufacturers
ber.
Code
Manufacturer
(2) Second. Using the Repair Part Listing,
19200
Frankford Arsenal
find the assembly group of the repair part and
Phila., Pa. 19137
Military Specifications promulgated by Stand-
81349
the illustration figure number and item number
ardization Div
referenced in the Index of Federal Stock Num-
Directorate of Logistics Services DSA
bers and Reference Numbers.
Military Specifications promulgated by Stand-
96906
ardization Div
6. Abbreviations.
Directorate of Logistics Services DSA
00000
Ordnance Corps
Abbreviation
Explanation
ac
alternating current
24617
General Motors Corp.
acrflt
across flats
3044 Grand Blvd.
al
aluminum
W. Detroit, Mich. 48202
alloy
49671
aly
Radio Corp. of America
amphere
Tube Division
amp
andz
anodize
Lancaster, Penna.
brs
brass
bfl
back focal length
8. Reporting of Errors.
black
blk
Report of errors, omissions, and recommenda-
cd pl
cadmium plate
tions for improving this publication by the in-
cncv
concave
4