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 5925-01-186-6344
NSN 6645-00-057-3499
NSN 5996-01-468-6073
NSN 6650-00-779-7294
NSN 5975-00-726-3565
NSN 2925-01-150-7160
NSN 5935-01-109-6316
NSN 5915-01-484-0894
NSN 6135-00-643-4843
NSN 5935-00-116-8929
NSN 6240-01-343-4322
NSN 6685-01-484-5552