A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 5998-00-573-0727
NSN 4140-00-773-6474
NSN 5965-01-426-8325
NSN 5975-01-141-5220
NSN 6150-00-441-2241
NSN 5975-01-315-7808
NSN 5905-00-714-6833
NSN 5960-01-286-3766
NSN 6105-01-383-7486
NSN 7035-01-656-6045
NSN 6645-00-155-2398
NSN 5998-01-155-4990