therefore, there may be a break in the item number se-
quence. Only illustrations containing organizational
When a stock numbered item is requisitioned,
authorized items appear in this manual.
the repair part received may have a different
part number than the part being replaced.
5. How to Locate Repair Parts
e. Federal Supply Code for Manufacturer (FSCM).
a. When National stock number or part number is
The FSCM is a 5-digit numeric code listed in SB 708-42
which is used to identify the manufacturer, distributor,
(1) First. Using the table of contents, determine
or Government agency, etc.
the functional group within which the item belongs.
f. Description. Indicates the Federal item name
This is necessary since illustrations are prepared for
and, if required, a minimum description to identify the
functional groups and listings are divided into the same
g. Unit of Measure (U/M). Indicates the standard
(2) Second. Find the illustration covering the
of the basic quantity of the listed item as used in perfor-
functional group to which the item belongs.
ming the actual maintenance function. This measure is
(3) Third. Identify the item on the illustration ,
expressed by a two-character alphabetical abbreviation
and note the illustration figure and item number of the
(e.g., ea, in, pr, etc). When the unit of measure differs
from the unit of issue, the lowest unit of issue that will
(4) Fourth. Using the Repair Parts Listing, find
satisfy the required units of measure will be requisition-
the figure and item number noted on the illustration.
b. When National stock number or part number is
h. Quantity Incorporated in Unit. Indicates the
quantity of the item used in the breakout shown on the
illustration figure, which is prepared for a functional
(1) First. Using the Index of National Stock
group, subfunctional group, or an assembly.
Numbers and Part Numbers, find the pertinent Na-
tional stock number or part number. This index is in
4. Special Information
NIIN sequence followed by a list of part numbers in
a. The following publication pertains to the
alpharneric sequence, cross-referenced to the illustration
AN/USM-98B and its components:
figure number and item number.
(2) Second. After finding the figure and item
-98A and AN/USM-98B
number, locate the figure and item number in the repair
b. The illustrations in this manual are identical to
those published in TM 11-6625-599-40P-2. Only
those parts assigned the third position SMR mainte-
nance code "C" or "O" are listed in the tabular listing;
(Next printed page is 4)