5305-00-655-9992 (FFS210)
NSN 5305-00-655-9992 (NIIN 00-655-9992) is a setscrew in Federal Supply Class 5305, Screws — an externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone. Manufacturer part number FFS210 (Federal Specifications Promulgated, CAGE 81348); also referenced as M70FS420-6C (Nylok LLC).
Key specs: case-hardened; 30 to 37 rockwell c overall hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required).