TM 10-3930-669-24P 6.  HOW TO LOCATE REPAIR PARTS a. When National Stock Number or Part Number Is Not Known. (1) First.        Using    the    table    of    contents, determine the assembly group or subassembly group to which the item belongs.  This is necessary since figures are   prepared   for   assembly   groups   and   subassembly groups, and listings are divided into the same groups. (2) Second.      Find   the   figure   covering   the assembly group or subassembly group to which the item belongs. (3) Third.  Identify the item on the figure and use the Figure and Item Number Index to find the NSN. b. When National Stock Number or Part Number Is Known. (1) First.    Using  the  National  Stock  Number or  the  Part  Number  Index,  find  the  pertinent  National Stock  Number  or  Part  Number.    The  NSN  index  is  in National Item Identification Number NIIN sequence (see 4a(1)).  The part numbers in the Part Number index are listed   in   ascending   alphanumeric   sequence   see   4b). Both indexes cross-reference you to the illustration/figure  and  item  number  of  the  item  you  are looking for. (2) Second.      Turn   to   the   figure   and   item number, verify that the item is the one you are looking for, then locate the item number in the repair parts list for the figure. 7.  ABBREVIATIONS For  standard  abbreviations  see  MIL-STD-12D,  Military Standard Abbreviations For Use On Drawings, Specifications, Standards and in Technical Documents. 6/(7 Blank)