TM 11-6625-622-20P
Code
National Stock Number. Indicates the National
Used on
c.
2AD
AN/URM-157
stock number assigned to the item and will be used for
AN/URM-157A
CYA
requisitioning purposes.
d. Part Number. Indicates the primary number
b. The following publications pertain to the AN/
used by the manufacturer (individual, company, firm,
URM157 and AN/URM157A and their components:
corporation, or Government activity), which controls
TM 11-5821-248-12, Radio Set AN/ARC-102
the design and characteristics of the item by means of
TM 11-5821-248-20P, Radio Set AN/ARC-102, FSN
its engineering drawings, specifications standards,
5821-050-8255
and inspection requirements, to identify an item or
TM 11-6625-622-12, Test Harness, Radio Set AN/
range of items.
URM-157 and ANP/URM-157A
NOTE
5. How to Locate Repair Parts
When a stock-numbered item is re-
a. When National stock number or part number is
quisitioned, the repair part received may
unknown.
have a different part number than the part
(1) First. Using the table of contents, determine.
being replaced.
the functional group within which the repair part be-
longs. This is necessary since illustrations are pre-
e. Federal Supply Code for Manufacturer (FSCM).
pared for functional groups and listings are divided
The FSCM is a 5-digit numeric code listed in SB
into the same groups.
708-42 which is used to identify the manufacturer,
(2) Second. Find the illustration covering the
distributor, or Government agency, etc.
functional group to which the repair part belongs.
f. Description. Indicates the Federal item name
(3) Third. Identify the repair part on the illustra-
and, if required, a minimum description to identify the
tion and note the illustration figure and item number
item.
of the repair part.
g. Unit of Measure (U/M). Indicates the standard
(4) Fourth. Using the Repair Parts Listing, find
of the basic quantity of the listed item as used in
the figure and item number noted on the illustration.
performing the actual maintenance function. This
b. When National stock number or part number is
measure is expressed by a two-character alphabetical
known.
abbreviation (e.g., ea, in, pr, etc.). When the unit of
(1) First. Using the Index of National Stock
measure differs from the unit of issue, the lowest unit
Numbers and Part Numbers, find the pertinent Na-
of issue that will satisfy the required units of measure
tional stock number or part number. This index is in
will be requisitioned.
ascending NIIN sequence followed by a list of part
h. Quantity Incorporated in Unit. Indicates the
numbers in ascending alphanumeric sequence, cross-
quantity of the item used in the breakout shown on the
-referenced to the illustration figure number and item
illustration figure, which is prepared for a functional
number.
group, subfunctional group, or an assembly.
(2) Second. After finding the figure and item
4. Special Information
number, locate the figure and item number in the
repair parts list.
a. Usable on codes are shown in the description
column. Uncoded items are applicable to all models.
6. Abbreviations
Identification of the usable on codes used in this publi-
cation are:
Not applicable.
(Next printed page is 4.1)
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