Identification of the usable on codes used in this
Z-Nonreparable item. When unserviceable, con-
demn and dispose at the level indicated in
c. National Stock Number. Indicates the National
stock number assigned to the item and will be used
b. The following publications pertain to the
for requisitioning purposes.
TV-7A/U, TV-7B/U, and TV-7D/U and their com-
d. Part Number. Indicates the primary number
used by the manufacturer (individual, company,
TM 11-6625-274-12, Test Sets, Electron Tube
firm, corporation, or Government activity), which
TV-7/U, TV-7A/U, TV-7B/U, and TV-7D/U.
controls the design and characteristics of the item
TM 11-6625-274-35, Test Sets, Electron Tube
b y m e a n s o f i t s e n g i n e e r i n g drawings,
TV-7/U, TV-7A/U, TV-7/U, TV-7A/U, TV-7B/U,
and i n s p e c t i o n
requirements to identify an item or range of items.
5. How to Locate Repair Parts
When a stock numbered item is
a. When National stock number or part number is
requisitioned, the repair part received
may have a different part number than
(1) First. Using the table of contents, determine
the part being replaced.
the functional group within which the item belongs.
e. Federal Supply Code for Manufacturer (FSCM).
This is necessary since illustrations are prepared for
The FSCM is a 5-digit numeric code listed in SB
functional groups and listings are divided into the
708-42 which is used to identify the manufacturer,
distributor, or Government agency, etc.
(2) Second. Find the illustration covering the
f. Description. Indicates the Federal item name
functional group to which the item belongs.
and, if required, a minimum description to identify
(3) Third. Identify the item on the illustration
the item. When the part to be used differs between
and note the illustration figure and item number of
serial numbers of the same model, the effective
serial numbers are shown as the last line of the
(4) Fourth. Using the Repair Parts Listing, find
t h e figure and item n u m b e r noted on the
g. Unit of Measure (U/M). Indicates the standard
of the basic quantity of the listed item as used in
b. When National stock number or part number is
performing the actual maintenance function. This
measure is e x p r e s s e d by a two-character
(1) First. Using the Index of National Stock
alphabetical abbreviation (e.g., ea, in, pr, etc). When
Numbers and part Numbers, find the pertinent
the unit of measure differs from the unit of issue, the
National stock number or part number. This index
lowest unit of issue that will satisfy the required
is in NIIN sequence followed by a list of part num-
units of measure will be requisitioned.
bers in alphameric sequence, cross-referenced to the
h. Quantity Incorporated in Unit. Indicates the
illustration figure number and item number.
quantity of the item used in the breakout shown on
(2) Second. After finding the figure and item
the illustration figure, which is prepared for a func-
number, locate the figure and item number in the
tional group, subfunctional group, or an assembly.
repair parts list.
4. Special Information
a. Usable on codes are shown in the description
column. Uncoded items are applicable to all models.