5306-00-558-4900 (FFS85TYPE2STYLE10PGRADE2)
NSN 5306-00-558-4900 (NIIN 00-558-4900) 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 FFS85TYPE2STYLE10PGRADE2 (Federal Specifications Promulgated, CAGE 81348); also referenced as MS35292-41 (Military Standards).
Key specs: finished head; 100 rockwell b maximum overall hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required). Related NSN 5306-00-225-9096.