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 5835-01-469-6706
NSN 5835-01-589-4735
NSN 6650-00-618-1118
NSN 5960-01-583-3127
NSN 5965-00-404-6809
NSN 6220-01-195-7620
NSN 6620-00-153-0982
NSN 5965-01-545-3629
NSN 5960-00-483-6074
NSN 6610-01-473-5678
NSN 6650-01-024-9554
NSN 6130-00-338-4441