TM 5-3895-362-24P 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  Part  Number  Index,  find  the  pertinent  National  Stock Number or Part Number.   The NSN index is in National Item Identification Number (NIIN) sequence (see paragraph   4.a.(1)).         The   part   numbers   in   the   Part Number index are listed in ascending alphanumeric sequence    (see  paragraph  4.b).      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’re 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. Abbreviations Explanation NIIN .................. National Item Identification Number (consists of the last 9 digits of the NSN) RPSTL.............. Repair Parts and Special Tools List 5