(individual, company, firm, corporation, or Government activity), which controls the design and characteristics of
the item by means of its engineering drawings, specification standards, and inspection requirements to identify an
item or range of items.
NOTE: When you use an NSN to requisition an item, the item you receive may have a different
part number from the part ordered.
DESCRIPTION AND USABLE ON CODE (UOC) (Column (6)). This column includes the following information:
The Federal item name and, when required, a minimum description to identify the item.
The physical security classification of the item is indicated by the parenthetical entry (insert applicable
physical security classification abbreviation, e.g., Phy Sec C1 (C) confidential, phy Sec Ca (S) Secret, Phy
Sec C1 (T) Top Secret).
Items that are included in kits and sets are listed below the name of the kit or set.
Spare/repair parts that make up an assembled item are listed immediately following the assembled item line
Part numbers for bulk materials are referenced in this column in the line item entry for the item to be
When the item is not used with all serial numbers of the same model, the effective serial numbers are shown
on the last line of the description (before UOC).
The usable on code, when applicable (see paragraph C-5, Special Information).
In the Special Tools List section, the basis of the issue (BOI) appears as the last line(s) in the entry for each
special tools, special TMDE, and other special support equipment. When density of equipment's supported
exceeds density spread indicated in the basis of issue, the total authorization is increased proportionately.
The statement "END OF FIGURE" appears just below the last item description in Column (5) for given figure
in both Section II and Section III.
QTY (Column (7)). The QTY (quantity per figure column) indicated the quantity of the item used in the breakout
shown on the illustration figure, which is prepared for a functional group, sub function group, or an assembly. A "V'
appearing in this column in lieu of a quantity indicated that the quantity is variable and the quantity may vary from
application to application.
C-4 EXPLANATION OF COLUMNS (SECTION IV)
NATIONAL STOCK NUMBER (NSN) INDEX
(1). STOCK NUMBER COLUMN this column lists the NSN by National Item Identification Number (NIIN)
sequence. The NIIN consists of the last nine digits of the NSN.
Example: 5305-01-674-1467 NIIN
When using this column to locate an item, ignore the first 4 digits of the NSN. However, the complete NSN
should be used when ordering items by stock number.