TM 9-2320-211-20P
5. How to Locate Repair Parts
ID . . . . . . inside diameter
in. . . . . . inch (es)
a. When Federal Stock Number or Reference
lg . . . . . . . long(length)
Number is Unknown:
NC . . . . . American National Coarse Thread.
(1) First. U s i n g t h e t a b l e o f c o n t e n t s
NF . . . . . American National Fine Thread.
no. . . . . . number(s)
determine the functional subgroup within which
nom . . . . . nominal
the repair part belongs. This is necessary since
NPT . . . . . . . American Standard Taper Pipe
illustrations are prepared for functional subgroups,
Threads.
and listings are divided into the same groups.
NPTF . . . . . . . American Standard Taper Pipe
(2) Second. Find the illustration covering the
Threads (Dryseal).
functional subgroup to which the repair part
NS . . . . . . American National Special Thread.
OA . . . . . overall
belongs.
OD . . . . . . outside diameter
(3) Third. Identify the repair part on the
pc . . . . . . piece(s)
illustration, and note the illustration figure and
P / N . . . . part number
item number of the repair part.
psi . . . . pounds per square inch
(4) Fourth. Using the repair parts listing,
S . . . . . . steel
find the functional subgroup to which the repair
sq . . . . . . square
tbd . . . . . . .thread(ed)(s)
part belongs, and locate the illustration figure and
thk . . . . thick (ness)
item number noted on the illustration.
TM . . . . technical manual
b. When the Federal Stock Number or
TS . . . . truck single type(tire chain).
Reference Number is Known:
TU . . . tube
UNC . . . Unified National Coarse Thread.
(1) First. Using the index of Federal stock
UNCA . . Unified National Coarse Thread (male).
numbers and reference numbers find the pertinent
UNF . . . Unified Fine Thread
Federal stock number or reference number. This
UNJF . . . Unified National Fine Thread with Controlled
index is in ascending FSN sequence followed by a
Radius Root and Increased Minor Diameter.
list of reference numbers in ascending alphameric
UNS . . . Unified Special Thread
sequence cross-referenced to the illustration figure
V. . . . volt(s)
number and item number.
7. Reporting of Equipment
Publication Im-
(2) Second. Using the repair parts listings,
provements
find the functional subgroup of the repair part and
The reporting of errors, omissions, and recoin-
the illustration figure number and item number
mendations for improving this publication by the
referenced in the index of Federal stock numbers
individual user is encouraged. Reports should be
and reference numbers.
submitted on DA Form 2028 (Recommended
Changes to Publications) and forwarded direct to:
assy
assembly (ies)
Commander, US Army Tank-Automotive Com-
AWG . . American Wire Gage
mand, A T T N : A M S T A - M A P , Warren, MI
cp . . . . candle power
dia . . . . diameter
48090.
ea . . . . each
FSN . . . Federal stock number
ft . . . . feet (foot)
hex . . . . hexagon (al)