b. The illustrations in this manual are identical to those
c. National Stock Number. Indicates the National stock
published in TM 11-5821-277-34P. Only those parts
number assigned to the item and will be used for requisi-
assigned the third position SMR maintenance code "C"
or "O" are listed in the tabular listing; therefore, there
d. Part Number. Indicates the primary number used by
may be a break in the item number sequence. Only illus-
the manufacturer (individual, company, firm, corpora-
trations containing organizational authorized items appear
tion, or Government activity), which controls the design
in this manual.
and characteristics of the item by means of its engineering
c. The following publication pertains to the
drawings, specifications, standards, and inspection re-
AN/ARC-134, AN/ARC-134A, and AN/ARC- 134B
quirements to identify an item or range of items.
and its components:
TM 11-5821-277-20, Radio Sets AN/ARC-134 and
When a stock numbered item is requisitioned,
AN/ARC-134A and AN/ARC-134B.
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, or
(1) First. Using the table of contents, determine the
Government agency, etc.
functional group within which the item belongs. This is
f. Description. Indicates the Federal item name and, if
necessary since illustrations are prepared for functional
required, a minimum description to identify the item.
groups and listings are divided into the same groups.
g. Unit of Measure (U/M). Indicates the standard of
(2) Second. Find the illustration covering the func-
the basic quantity of the listed item as used in performing
tional group to which the item belongs.
the actual maintenance function. This measure is ex-
(3) Third. Identify the item on the illustration and
pressed by a two-character alphabetical abbreviation (e.g.,
note the illustration figure and item number of the item.
ea, in, pr, etc). When the unit of measure differs from the
(4) Fourth. Using the Repair Parts Listing, find the
unit of issue, the lowest unit of issue that will satisfy the
figure and item number noted on the illustration.
required units of measure will be requisitioned.
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
(1) First. Using the Index of National Stock Num-
figure, which is prepared for a functional group, subfunc-
bers and Part Numbers. find the pertinent National stock
tional group, or an assembly.
number or part number. This index is in NIIN sequence
4. Special Information
followed by a list of part numbers in alphameric sequence,
a. Usable on codes are shown in the description col-
cross-referenced to the illustration figure number and
umn. Uncoded items are applicable to all models. Iden-
tification of the usable on codes used in this publication
(2) Second. After finding the figure and item num-
ber, locate the figure and item number in the repair parts
(Next printed page is 4)