A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6610-00-273-9019
NSN 5925-01-089-2175
NSN 6130-01-367-9681
NSN 5925-01-513-9924
NSN 5990-00-170-9553
NSN 5996-01-166-5716
NSN 5985-01-642-0547
NSN 6650-01-160-5058
NSN 6685-00-909-9528
NSN 5975-00-430-1220
NSN 5960-01-224-8022
NSN 5930-00-052-3897