ARMY   TM   9-2815-253-24P AIR  FORCE  TO  38G1-93-4 MARINE  CORPS  TM  2815-24P/1 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  (NIIN) sequence. The NIIN consists of the last nine digits of the NSN NSN (i.e.,    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. (2) FIG. Column. This column list the number of the figure where the item is identified/located. The figures are in numerical order in Section II and Section Ill. (3) ITEM  Column,    The item number identifies the item associated with the figure listed in the adjacent FlG. 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 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 engineer- ing  drawings,  specifications  standards,  and  inspection  requirements  to  identify  an  item  or  range  of  items. (3) STOCK  NUMBER  Column,   This  column  lists  NSN  for  the  associated  part  number  and  manufacturer identified in the PART NUMBER and FSCM columns to the left. 8