A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6110-01-251-1545
NSN 5996-01-522-7732
NSN 5915-00-146-2451
NSN 5965-00-404-6809
NSN 6685-01-331-8494
NSN 6240-01-013-8895
NSN 2925-01-656-8217
NSN 6620-00-932-4306
NSN 6610-00-410-6072
NSN 5965-00-985-9157
NSN 6135-00-321-6707
NSN 5999-01-469-8138