TM   9-2520-272-34&P 49 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 When   using   this   column   to   locate   an   item,   ignore   the   first   4   digits   of complete   NSN   should   be   used   when   ordering   items   by   stock   number. NSN   (National   Stock   Number) 5305-01-674-1467 I NIIN    (National    Item    Identification    Number) nine’  digits  of  the  NSN. the   NSN.   However,   the (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   Sections   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. 5. Special   Information.   Use   the   following   subparagraphs   as   applicable: a USABLE  ON  CODE.   Not   applicable. b. FABRICATION   INSTRUCTIONS.   Not   applicable. B-7