5305-00-006-2410 (FFS85)
NSN 5305-00-006-2410 (NIIN 00-006-2410) is a hexagon head cap screw in Federal Supply Class 5305, Screws — an externally threaded fastener designed for insertion into holes in assembled parts. Manufacturer part number FFS85 (Federal Specifications Promulgated, CAGE 81348); also referenced as MS51105-412, NASM51105 (National Aerospace Standards).
Key specs: 25 to 34 rockwell c overall hardness; full characteristics table below. NIIN assigned June 1972; DEMIL A (none required); unit of issue EA (each), $39.96 gov standard price.