A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 5835-01-436-6549
NSN 6685-00-898-0163
NSN 5996-01-245-8209
NSN 6620-01-377-8178
NSN 4140-01-232-1026
NSN 5855-01-412-5147
NSN 7035-01-438-2108
NSN 6105-01-040-9677
NSN 5965-01-364-0829
NSN 5895-00-269-3848
NSN 6130-00-126-3743
NSN 6650-01-373-8067