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 6105-00-518-1854
NSN 6105-00-541-8472
NSN 5999-01-165-0039
NSN 5996-01-246-2472
NSN 4140-00-438-2485
NSN 4140-00-952-4047
NSN 6650-00-119-3966
NSN 5925-00-964-4989
NSN 6650-01-119-3058
NSN 5855-00-118-8762
NSN 5835-00-092-1136
NSN 5999-00-088-5855