TM  10-3930-657-24P 6. How To Locate Repair Parts (Con’t). (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 4a(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  MlL-STD-12D,  Military  Standard  Abbreviations  for  Use  on  Drawings, Specifications,  Standards,  and  in  Technical  Documents. Abbreviations NIIN . . . . . . . . . . . . . . . . . RPSTL . . . . . . . . . . . . . . . SMR . . . . . . . . . . . . . . . . . TMDE . . . . . . . . . . . . . . . . Explanation National  Item  Identification  Number (consists of the last 9 digits of the NSN) Repair Parts and Special Tools Lists Source,  Maintenance,  and  Recoverability Code Test,  Measurement,  and  Diagnostic Equipment 7 Change  1