A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 5965-00-925-1725
NSN 5920-01-631-0328
NSN 6150-00-222-5302
NSN 6685-00-255-0396
NSN 5910-00-391-1825
NSN 6220-01-125-0468
NSN 5925-01-351-2312
NSN 6130-01-440-6527
NSN 5945-01-253-6221
NSN 6645-01-316-3859
NSN 6320-00-646-3311
NSN 6135-01-199-1185