A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6130-01-394-6489
NSN 6130-01-309-5020
NSN 5996-01-485-0305
NSN 5985-01-514-5121
NSN 6145-01-431-6834
NSN 6220-01-182-9172
NSN 6610-01-221-2606
NSN 5965-00-052-9184
NSN 6135-01-503-1688
NSN 5835-01-112-9008
NSN 6610-01-535-0310
NSN 5945-00-467-3020