When National Stock Number or Part Number is Known.
(1) First. Using the Index of National Stock Numbers and Part Numbers, find the pertinent National Stock
Number or Part Number. The NSN index is in National Item Identification Number (NIIN) sequence (see paragraph
F-4a.(1)). The part numbers in the Part Number index are listed in ascending alphanumeric sequence (see paragraph
F-4b.). Both indexes cross-reference you to the illustration figure and item number of the item you are looking for.
(2) Second. After finding 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.
Abbreviations used in this appendix are listed in MIL-STD-12.