National Item Identification Number
National Stock Number
Federal Supply Class
A washer or cone or disk shape with a centrally located hole, designed to accommodate a flat or oval head screw and provide additional bearing area on the material being fastened. It may or may not have a flush flange feature.
Commercial and Government Entity Code (Supplier Data)
Reference Numbers (Part Numbers)
MATERIAL DOCUMENT AND CLASSIFICATION
QQ-S-636,COND 3-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL