b. 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
Stack Number or Part Number. The NSN index is in 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
4.6). Both indexes cross-reference you to the illustration figure and item number of the item you are looking
(2) Second. After finding 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.