Number Index, find the pertinent National Stock Number or Part
The NSN index is in National Item Identification Number
The part numbers in the Part Number index are
Both indexes cross-
listed in ascending alphanumeric sequence.
-reference you to the illustration/figure and item number of the
item you are looking for.
Turn to the figure and item number, verify
that the item is the one you're looking for, then locate the item
number in the repair parts list for the figure.