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 6105-01-649-6501
NSN 6150-01-395-5330
NSN 6645-00-462-7072
NSN 5996-01-351-6181
NSN 7035-01-245-7973
NSN 6130-01-189-0229
NSN 5999-01-590-5769
NSN 6650-01-197-4585
NSN 5945-01-068-3503
NSN 5915-01-310-6215
NSN 5996-01-558-2249
NSN 6145-00-165-3869