Special Information

TM 11-5985-326-24P

b. The following publications pertain to the CU-

drawings, specifications, standards, and inspection

requirements to identify an item or range of items.

1658/A, CU-1658A/A, CU-1669/GRC, and MT-3785/A

and their components.

NOTE

TM 11-5985-326-20, Coupler, Antenna CU-1658/A and

When a stock numbered item is

CU-1669/GRC

requisitioned, the repair part received

TM 11-5985-326-35, Coupler, Antenna CU-1658/A and

may have a different part number

CU-1669/GRC

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

unknown.

which is used to identify the manufacturer, distributor, or

(1) First.

Using the table of contents,

Government agency, etc.

determine the functional group within which the item

Description. Indicates the Federal item name

belongs.

This is necessary since illustrations are

and, if required, a minimum description to identify the

prepared for functional groups and listings are divided

item.

into the same groups.

g. Unit of Measure (U/M). Indicates the standard of

(2) Second. Find the illustration covering the

the basic quantity of the listed item as used in performing

functional group to which the item belongs.

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

item.

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

the figure and item number noted on the illustration.

requisitioned.

b. When National stock number or part number is

h. Quantity Incorporated in Unit. Indicates the

known.

quantity of the item used in the breakout shown on the

(1) First. Using the Index of National Stock

illustration figure, which is prepared for a functional

Numbers and Part Numbers, find the pertinent National

group, subfunctional group, or an assembly.

stock number or part number. This index is in NIN

4. Special Information

sequence followed by a list of part numbers in

a. Usable on codes are shown in the description

alphanumeric sequence, cross-referenced to the

column. Uncoded items are applicable to all models.

illustration figure number and item number.

Identification of the usable on codes used in this

(2) Second. After finding the figure and item

publication are:

number, locate the figure and item number in the repair

Code

Used on

pats list.

AKD

CU-1658/A

6. Abbreviations

5H4

CU-1658A/A

Not applicable.

3LU

CU-1669/GRC

5H3

MT-3785/A.

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