4. Special Information
d. Part Number. Indicates the primary number used
The following publication pertains to the
by the manufacturer (individual, company, firm, cor-
MX-7778A/GRC and its components: TM 11-5915-224-14
poration, or Government activity), which controls the
Suppressor, Electrical Transient MX-7778A/GRC.
design and characteristics of the item by means of its
5. How to Locate Repair Parts
engineering drawings, specifications standards, and
a. When National stock number or part number is
inspection requirements, to identify an item or range
(1) First. Using the table of contents, determine
the functional group within which the repair part
When a stock numbered item is requisi-
belongs. This is necessary since illustrations are pre-
tioned, the repair part received may have a
pared for functional groups and listings are divided
different part number than the part being
into the same groups.
(2) Second. Find the illustration covering the func-
tional group to which the repair part belongs.
e. Federal Supply Code for Manufacturer (FSCM).
(3) Third. Identify the repair part on the illustra-
The FSCM is a 5-digit numeric code listed in SB 708-42
tion and note the illustration figure and item number
which is used to identify the manufacturer, distributor,
of the repair part.
or Government agency, etc.
(4) Fourth. Using the Repair Parts Listing, find
f. Description. Indicates the Federal item name and,
the figure and item number noted on the illustration.
if required, a minimum description to identify the item.
b. When National stock number or part number is
g. Unit of Measure (U/M). Indicates the standard of
the basic quantity of the listed item as used in perform-
(1) First. Using the Index of National Stock Num-
ing the actual maintenance function. This measure is
bers and Part Numbers, find the pertinent National
expressed by a two-character alphabetical abbrevia-
stock number or part number. This index is in ascend-
tion (e.g., ea, in, pr, etc.). When the unit of measure
ing NIIN sequence followed by a list of part numbers in
differs from the unit of issue, the lowest unit of issue
ascending alphameric sequence, cross-referenced to the
that will satisfy the required units of measure will be
illustration figure number and item number.
(2) Second. After finding the figure and item num-
ber, locate the figure and item number in the repair
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
group, subfunctional group, or an assembly.
(Next printed page is 5)