A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6135-01-421-1052
NSN 5925-01-322-9473
NSN 5895-01-309-7613
NSN 5965-01-534-9961
NSN 5905-00-810-1972
NSN 6645-01-048-6845
NSN 5965-01-425-1347
NSN 4140-01-596-7716
NSN 5930-01-625-4876
NSN 5975-01-044-8950
NSN 6610-01-623-6228
NSN 5910-01-388-9705