TM 3-1040-281-20&P
C-4. 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
NSN
(NIIN) sequence. The NIIN consists of the last nine digits of the NSN (i.e-5385-01-574-1476).
When using this manual 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 arrangment 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 fiqure where the item is identified/located in sections 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-5. SPECIAL INFORMATION.
a. Fabrication Instructions. Bulk materials required to manufacture items are listed in the bulk material func-
tional group of this RPSTL. Part numbers for bulk materials are also referenced in the description column of the line
item entry for the item to be manufactured/fabricated. Detailed fabrication instructions for items source coded to be
manufactured or fabricated are found in this manual.
b. Index Numbers. Items which have the word BULK in the figure column will have an index number shown in
the item number oolumn. This index number is a cross-reference between the National Stock Number/Part Number
index and the bulk material list in section II.
C-6. HOW TO LOCATE REPAIR PARTS.
a. When National Stock Number or Part Number is Not Known:
(1) 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.
(2) Second. Find the figure covering the functional group or subfunctional group to which the item belongs.
(3) Third. Identify the item on the figure and note the item number.
(4) Fourth. Refer to the Repair Parts List for the figure to find the part number for the item number noted on
the figure.
(5) Fifth. Refer to the Part Number Index to find the NSN, if assigned.
C-5