A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6240-00-514-3507
NSN 5920-01-577-7080
NSN 5855-00-586-6255
NSN 6145-01-596-7647
NSN 5945-00-587-5507
NSN 4140-01-521-2357
NSN 5998-01-579-4305
NSN 5910-01-245-4637
NSN 5999-01-471-9836
NSN 5925-01-512-0779
NSN 6135-00-998-5884
NSN 5925-01-141-6688