2. General. - (Continued)
Section IV. National Stock Number and Part Number Index. A list, in National Item Identification Number (NIIN)
sequence, of all national stock numbered items appearing in the listing, followed by a list in alphanumeric sequence of all
part numbers appearing in the listings. National stock numbers and part numbers are cross-referenced to each
illustration figure and item number appearance.
Explanation of Columns (Sections II and III).
ITEM NO, (Column (1)). Indicates the number used to identify items called out in the illustration.
SMR CODE (Column (2)). The Source, Maintenance, and Recoverability (SMR) code is a 5-position code
containing supply/requisitioning information, maintenance category authorization criteria, and disposition instruction, as
shown in the following breakout:
How you get an item
Who can install,
Who can do
action on an
replace or use
*Complete Repair: Maintenance capacity, capability, and authority to perform all corrective maintenance tasks of the
"Repair" function in a use/user environment in order to restore serviceability to a failed item.
(1) Source Code. The source code tells you how to get an item needed for maintenance, repair, or overhaul of an
end item/equipment. Explanations of source codes follows: