A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 5895-01-531-6452
NSN 5998-01-415-5525
NSN 6240-01-459-8758
NSN 6620-01-123-6663
NSN 6220-00-006-9746
NSN 5905-01-359-1800
NSN 6645-00-551-8291
NSN 5920-01-151-4277
NSN 5996-01-274-1025
NSN 6645-00-917-2143
NSN 6110-01-441-8151
NSN 6130-01-493-3102