5306-00-680-4855 (FFB575)
NSN 5306-00-680-4855 (NIIN 00-680-4855) is a machine bolt in Federal Supply Class 5306, Bolts — an externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. Manufacturer part number FFB575 (Federal Specifications Promulgated, CAGE 81348).
Key specs: finished head; 70 rockwell b minimum and 100 rockwell b maximum overall hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required). Related NSN 5306-00-395-4272.