5306-00-248-8680 (FFB584TYPE1CLASS1STYLEA)
NSN 5306-00-248-8680 (NIIN 00-248-8680) is a square neck bolt in Federal Supply Class 5306, Bolts — a headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head. Manufacturer part number FFB584TYPE1CLASS1STYLEA (Federal Specifications Promulgated, CAGE 81348).
Key specs: 95 rockwell b maximum overall hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required). Supersedes 5306-00-260-7412 (1979); related NSN 5306-00-177-5733.