NAVELEX EE 181-AA-OMI-13A/E121 R1861-T1257
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
Stock Number or Part Number. The NSN index is in National Item Identification Number (NIIN)
sequence (see 4a(1)). The part numbers in the Part Number index are listed in ascending alphanumeric
sequence (see paragraph 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.
7. ABBREVIATIONS. Abbreviations used in this manual are listed in MIL-STD-12.