A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6620-01-566-1142
NSN 6240-00-214-9073
NSN 2925-00-491-3549
NSN 5965-01-415-0004
NSN 6110-01-347-0116
NSN 5975-01-633-1071
NSN 5950-00-328-4474
NSN 5905-01-526-2157
NSN 6135-00-505-0679
NSN 5925-01-585-8093
NSN 6145-00-754-8372
NSN 5925-01-542-9068