When National Stock Number or Part Number is known:
(1) First. Using the National Stock Number of the Part Number Index, find the pertinent National Stock Number
or Part Number. The NSN index is the National Item Identification Number (NIIN) sequence (see 4.1(1)).
The part numbers in the Part Number index are listed in ascending alphanumeric sequence (see 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 youre looking for, then locate the
item number in the repair parts list for the figure.