National Item Identification Number
National Stock Number
Federal Supply Class
Referenced on: http://computerequipment.tpub.com//TM-11-7440-278-23P/TM-11-7440-278-23P0266.htm
A metallic item, usually square or rectangular in cross section, usually longer in relation to its width and thickness, with or without a head, usually designed to fit into the pre-cut slots of two adjacent cylindrically shaped members, to prevent relative rotational movement between the two. It may have mounting holes or slots.
Commercial and Government Entity Code (Supplier Data)
Reference Numbers (Part Numbers)
THE MANUFACTURERS DATA