E-4 EXPLANATION OF COLUMNS (SECT. IV) (CONT).
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 referenced in the adjacent figure number column.
E-5 HOW TO LOCATE REPAIR PARTS.
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 sub-
assembly groups, and listings are divided into the same groups.
(2) Second. Find the figure covering the assembly group or subassembly 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.