TM 5-4310-250-24P f. QTY (Column (6)).  The QTY (quantity per figure column)  indicates  the  quantity  of  the  item  used  in  the breakout    shown    on    the    illustration    figure,    which    is prepared  for  a  functional  group,  subfunctional  group,  or an assembly.  A "V" appearing in this column in lieu of a quantity  indicates  that  the  quantity  is  variable  and  the quantity may vary from application to application. 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 NSN digits of the NSN (i.e., 5305-01-674-1467.) When using NIIN 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    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 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. c. FIGURE AND ITEM NUMBER INDEX. (1) FIG.    column.        This    column    lists    the number  of  the  figure  where  the  item  is  identified/located in Section II and III. (2) 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. (3) STOCK  NUMBER  column.    This  column lists the NSN for the item. (4) 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. (5) 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. 5.  Special Information. Use the following subparagraphs as applicable: a. USABLE   ON   CODE.      The   usable   on   code appears   in   the   lower   left   comer   of   the   Description column   heading.      Usable   on   codes   are   shown   as "UOC........”  in  the  Description  Column  (justified  left)  on the first line following applicable item description/nomenclature.  Uncoded items are applicable to all models.  Identification of the usable on codes used in the RPSTL are: Code Use On AZM M250RPV AZN 6M250RPV BYY 9M250RPV b. FABRICATION INSTRUCTIONS. Bulk materials required to manufacture items are listed in the Bulk   Material   Functional   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 TM 5-4310-250-15. 4