EXPLANATION OF COLUMNS (SECTION IV).
a. 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 (i.e.,
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
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 111.
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).
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.
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.
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.
FIG. column. This column lists the number of the figure where the item is identified/located in sections II and III.
ITEM column. The item number is that number assigned to the item as it appears in the figure referenced in the adjacent figure number
SPECIAL INFORMATION. Not applicable.
HOW TO LOCATE REPAIR PARTS.
a. When National Stock Number or Part Number is Not Known:
First. Using the table of contents, determine the assembly group or subassembly group to which the item belongs. This is necessary since
figures are prepared for assembly groups and subassembly groups, and listings are divided into the same groups.
Second. Find the figure covering the functional group or subfunctional group to which the item belongs.
Third. Identify the item on the figure and note the item number.
Fourth. Refer to the Repair Parts List for the figure to find the part number for the item number noted on the figure.
Fifth. Refer to the Part Number Index to find the NSN, if assigned.