TM 9-4520-260-23P
4. Explanation of Columns (Section IV).
a. NATIONAL STOCKNUMBER (NSN) INDEX.
(1) STOCK NUMBER column. This column lists the NSN by National item identification number (NIIN)
NSN
sequence. The NIIN consists of the last nine digits of the NSN (i.e., 5305-01-674-1467). When using this
NIIN
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.
(2) FIG. column. This column lists the number of the figure where the item is identified/located. The
figures are in numerical order in Section II and Section III.
(3) ITEM column. The item number identifies the item associated with the figure listed in the adjacent
FIG. column. This item is also identified by the NSN listed on the same line.
b. PART NUMBER INDEX. Part numbers in this index are listed by part number in ascending
alphanumeric sequence (i.e., vertical arrangement of letter and number combination which places the first letter
or digit of each group in order A through Z, followed by the numbers 0 through 9 and each following letter or
digit in like order).
(1) FSCM column. The Federal Supply Code for Manufacturer (FSCM) is a 5-digit numeric code used to
identify the manufacturer, distributor, or Government agency, etc., that supplies the item.
(2) PART NUMBER column. Indicates the primary number used by the manufacturer (individual, firm,
corporation, or Government activity), which controls the design and characteristics of the item by means of its
engineering drawings, specifications standards, and inspection requirements to identify an item or range of
items.
(3) STOCK NUMBER column. This column lists the NSN for the associated part number and
manufacturer identified in the PART NUMBER and FSCM columns to the left.
(4) FIG column. This column lists the number of the figure where the item is identified/located in Section
II and III.
(5) ITEM column. The item number is that number assigned to the item as it appears in the figure refer-
enced in the adjacent figure number column.
c. FIGURE AND ITEM NUMBER INDEX.
(1) FIG. column. This column lists the number of the figure where the item is identified/located in
Section II and III.
(2) ITEM column. The item number is that number assigned to the item as it appears in the figure refer-
enced in the adjacent figure number column.
(3) STOCK NUMBER column. This column lists the NSN for the item.
(4) FSCM column. The Federal Supply Code for Manufacturer (FSCM) is a 5-digit numeric code used to
identify the manufacturer, distributor, or Government agency, etc., that supplies the item.
(5) PART NUMBER column. Indicates the primary number used by the manufacturer (individual, firm,
corporation, or Government activity), which controls the design and characteristics of the item by means of its
engineering drawings, specifications standards, and inspection requirements to identify an item or range of
items.
5. Special Information.
a. USABLE ON CODE. The usable on code appears in the lower left corner of the Description column
heading. Usable on codes are shown as "UOC: ......... in the Description Column (justified left) on the first line
applicable item description/nomenclature. Uncoded items are applicable to all models.
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