A headless fastener externally threaded on both ends with each threaded portion of one but not necessarily the same nominal diameter. It is designed to be locked in place by either a ring, lock, serrated or a ring, lock, keyed.
NSN 5895-01-412-1325
NSN 5965-01-122-2750
NSN 5835-00-807-5632
NSN 6320-00-194-4252
NSN 6135-01-415-4124
NSN 6320-01-445-5893
NSN 5925-01-163-0160
NSN 5925-01-329-1660
NSN 5999-01-218-1918
NSN 6650-01-492-1440
NSN 5950-01-640-7387
NSN 5960-01-495-0859