A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6135-00-078-9931
NSN 5950-01-457-0033
NSN 6150-01-089-9401
NSN 5999-01-231-6512
NSN 6620-01-532-4147
NSN 6685-00-375-1526
NSN 5950-01-294-7711
NSN 6240-00-635-9953
NSN 5930-01-240-5290
NSN 5895-01-616-1557
NSN 6110-01-163-6122
NSN 5945-00-203-5575