A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 5915-01-271-5748
NSN 5895-01-616-6361
NSN 6685-01-065-7887
NSN 2925-01-191-9668
NSN 5920-00-479-5254
NSN 6145-01-246-3112
NSN 5920-01-629-5424
NSN 6135-00-519-1325
NSN 5999-00-343-6770
NSN 5965-00-182-7928
NSN 6135-01-483-1501
NSN 2925-01-391-9247