5320-00-290-8944 (FFR556TYPE11CLASS1GRADEE)
NSN 5320-00-290-8944 (NIIN 00-290-8944) is a split rivet in Federal Supply Class 5320, Rivets — a headed fastening device having a smooth shank which is split, slotted or forked and designed to be spread or crimped back after insertion. Manufacturer part number FFR556TYPE11CLASS1GRADEE (Federal Specifications Promulgated, CAGE 81348); also referenced as MS35684-14 (Military Standards).
Key specs: 60 rockwell b minimum overall hardness; full characteristics table below. NIIN assigned January 1960; DEMIL A (none required); export Schedule B 8308.20.0000. Supersedes 5320-00-013-6661 (1967).