A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6105-01-442-7801
NSN 6145-00-765-2584
NSN 5835-00-614-0650
NSN 6110-00-957-3939
NSN 6220-01-188-6962
NSN 5920-01-327-2386
NSN 6150-00-155-3578
NSN 6145-01-436-4900
NSN 5990-00-004-4158
NSN 6220-00-308-9728
NSN 6320-01-340-4112
NSN 5835-01-186-4961