A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6685-01-592-0709
NSN 5910-00-780-5461
NSN 5915-01-643-8429
NSN 5985-00-889-4217
NSN 6135-00-134-6648
NSN 6620-01-016-8264
NSN 6685-01-210-3154
NSN 5998-01-020-6254
NSN 6150-00-777-5209
NSN 6240-00-756-5149
NSN 6110-01-201-3424
NSN 5895-01-332-1173