TM 11-6625-1621-20P
c. National Stock Number. Indicates the National
Code
Used on
3H2
AN/PRM-31
stock number assigned to the item and will be used for
5DG
AN/PRM-31A
requisitioning purposes.
d. Part Number. Indicates the primary number
ASO
AN/PRm-31B
b. The following publication pertains to the
used by the manufacturer (individual, company, firm,
AN/PRM-31, AN/PRM-31A, and AN/PRM-31B and its
corporation, or Government activity), which controls the
components:
design and characteristics of the item by means of its
TM 11-6625-1621-12, Radio Test Sets AN/
engineering drawings, specifications standards, and
PRM-31, AN/PRM-31A, and AN/PRM-31B.
inspection requirements, to identify an item or range of
c. The illustrations in this manual are identical to
item.
those published in TM 11-6625-1621-40P. Only those
NOTE
parts assigned to the third position SMR maintenance
When a stock-numbered item is requisitioned,
code "C" or "O" are listed in the tabular listing; therefore,
the repair part received may have a different
there may be a break in the item number sequence. Only
part number than the part being replaced.
illustrations containing organizational authorized items
e
Federal Supply Code for Manufacturer (FSCM).
appear in this manual.
The FSCM is a 5-digit numeric code listed in SB 708-42
5. How to Locate Repair Parts
which is used to identify the manufacturer, distributor,
a. When National stock number or part number is
or Government agency, etc.
f. Description. Indicates the Federal item name
unknown.
(1) First. Using the table of contents, determine
and, if required, a minimum description to identify the
item.
the functional group within which the repair part belongs.
g. Unit of Measure (U/M). Indicates the standard of
This is necessary since illustrations are prepared for
the basic quantity of the listed item as used in performing
functional groups and listings are divided into the same
the actual maintenance function. This measure is
groups.
(2) Second. Find the illustration covering the
expressed by a two-character alphabetical abbreviation
(e.g., ea, in, pr, etc.). When the unit of measure differs
functional group to which the repair part belongs.
(3) Third. Identify the repair part on the
from the unit of issue, the lowest unit of issue that will
satisfy the required units of measure will be
illustration and note the illustration figure and item
requisitioned.
number of the repair part.
h. Quantity Incorporated in Unit. Indicates the
(4) Fourth. Using the Repair Parts Listing, find
quantity of the item used in the breakout shown on the
the figure and item number noted on the illustration.
illustration figure, which is prepared for a functional
b. When National stock number or part number is
group, subfunctional group, or an assembly.
known.
(1) First. Using the Index of National Stock
4. Special Information
Numbers and Part Numbers, find the pertinent National
a. Usable on codes are shown in the description
stock number or part number. This index is in ascending
NIIN sequence followed by a list of part numbers in
column. Uncoded items are applicable to all models.
ascending alphameric sequence, cross-referenced to the
Identification of the usable on codes used in this
illustration figure number and item number.
publication are:
(2) Second. After finding the figure and item
number, locate the figure and item number in the repair
parts list.
6. Abbreviations
Not applicable.
(Next printed page is 4.)
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