TM 10-4930-251-12&P 4. EXPLANATION OF CROSS-REFERENCE INDEXES FORMAT AND COLUMNS. n. National  Stock  Number    (NSNj   Index. (1) STOCK   NUMBER   COLUMN.   This   column   lists   the   NSN   in   National   item    idunification numhcr    (NIIN)  scquencc.  The  NIIN consists of  the  last   lnine  digits  oi  the  NSN. NSN When using this column to locate  an item,  ignore the first (e.g.,   5185-01-574-1476) four   digits   of   the   NSN.   However,   the   complete   NSN N I I N should   he   used   when   ordering      items   by   stock   numhcr. (2) FIG.  COLUMN.  This  column  lists  the  number  of   the   fiyure  where  the  item   is  identified/ located. The figures are in numerical order in the repair parts list and special tools list. (3) ITEM  COLUMN.  The  item  number  identifies  the  item  associated  with  the  figure  listed  in the  xljxent FIG. column. This item is also   identified  by  the  NSN  listed  on  the  satne  line. b . Part  iVumber [P/N)  Index. P/Ns in this index arc listed in ascending alphanumeric  sequence  (vertical armngcmcnt of letter and number combinations which places the first  letter  or digit of each  proup   in orderA through Z, followed hy the numbers 0 through 9, and each following letterordipit   in like order). (1) CAGEC     COLUMN. The  Commercial  and  Government  Entity   Code  (CAGEC)  is  a   5.digit numeric code used to identify the manufacturer,     distrihuter  01  Government agency/activity that   supplies   the   item. (2) PART   NUMBER   COLUMN.   Indicates   the   primary   number    used  by  the    manufxturet (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    numba and  manufacturer  identified  in  the  PART  NUMBER  and  CAGEC  columns  to  the  left. (4) FIG.  COLUMN.  This  column  lists  the  number  of  the  figure  where  the  item  is  identified/ located in the rzpair   parts list and special tools list. (5) ITEM  COLUMN.  The  item  number  is  the  number  assigned  to  the  item  as it appears in  the figure referenced in the adjacent figure number column. 5. SPECIAL INFORMATION. a. Usable  On  Code.  The  Usable  On  Code  appears  in  the  lower  left  corner  of  the  Description  column heading. Usable on codes are shown as “UOC...” in the Description column (justified left) on the last line applicahlc    item descl-iption/nomenclaturc. Uncoded   or none listed items arc applicable    to all models. b . Fabrication  I~utructions. Bulk materials required to manufacture items are listed in the hulk material functional group of this RPSTL. Part numbers for hulk material are also referenced in the Description Column of the line item entry for the item to he manufactured/fabricated. Detailed fabrication    instruclions for items source coded to be manufactured or fabricated are found in Appendix G. c. Zndex Numbers.  Items  which  have  the  word  BULK  in  the  figure  column  will  have  an  index  number shown in  the   item  number  column.  This  index  number  is  a  cross-reference  between  the  NSN  I  P/N index and the bulk material list in the repair parts list. F - 5