TM 5-3805-254-20P 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 NIIN using  this  column  to  locate  an  item,  ignore  the  first4  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) CAGEC   column.      The   Commercial   and Government Entity (CAGE) Code (C) is a 5-digit alphanumeric 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  CAGE  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. c. FIGURE AND ITEM NUMBER INDEX. (1) FIG.        column.        This    column    lists    the number  of  the  figure  where  the  item  is  identified/located  in Sections II and Ill. (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) CAGE    column.        The    Commercial    and Government   Entity   (CAGE)   is   a   5-digit   alphanumeric   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. a. USABLE   ON   CODE.      The   usable   on   code appears   in   the   lower   left   comer   of   the   Description   column heading.  Not Applicable. 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 5-3805-254-20. c. ASSEMBLY INSTRUCTIONS. Detailed assembly instructions for items source coded to be assembled from  component  spare/repair  parts  are  found  in  TM  5-3805- 254-20.        Items    that    make    up    the    assembly    are    listed immediately following the assembly  item  entry  or  reference  is made to an applicable figure. d. KITS.      Line   item   entries   for   repair   parts   kits appear in group 9401 in Section II. e. INDEX 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  National  Stock  Number/Part  Number Index and the bulk material list in Section II. 4