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 Na-
tional Stock Number or Part Number. The NSN index is in National Item Identification Number (NIIN) se-
quence (see c-4a.(1)). The part numbers in the Part Number index are listed in ascending alphanumeric se-
quence (see paragraph c-4.b). 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 look-
ing for, then locate the item number In the. repair parts list for the figure.
ABBREVIATIONS. Abbreviations used in this manual are listed in MIL-STD-12.