TM 10-3510-220-24P (7) The usable on code,  when applicable (see paragraph 5,  Special Information) (8)   In the Special Tools List section,  the basis of issue (BOI) appears as the last line(s) in the entry for each special tool,  special TMDE,  and other special support equipment.  When density of equipments supported exceeds density spread indicated in the basis of issue,  the total authorization is increased proportionately. (9) The statement "END OF FIGURE" appears just below the last item description In Column 5 for a given figure in both Section II and Section III. (10)    The indenture,  shown as dots appearing before the repair part,  indicates that the item is a repair part of the next higher assembly. 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 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 digits of the NSN,  i e NSN 5305-01-574-1467 NIIN When 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 Code (CAGEC) 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 CAGEC columns to the left 5