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 5920-01-165-6881
NSN 6685-01-420-4006
NSN 6105-01-023-2144
NSN 5945-00-818-9573
NSN 6110-00-596-9124
NSN 5985-00-695-4547
NSN 5998-01-540-3270
NSN 5910-01-571-7621
NSN 5996-01-181-7057
NSN 5920-01-169-4114
NSN 5945-01-024-9378
NSN 6110-01-211-6535