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 5960-00-735-1100
NSN 6220-01-327-0554
NSN 5920-01-263-7012
NSN 5990-01-658-3102
NSN 6105-01-074-1180
NSN 6130-01-003-7543
NSN 5930-01-022-0443
NSN 6685-01-281-7267
NSN 6610-01-555-6654
NSN 6110-01-455-4453
NSN 5996-01-258-3651
NSN 6110-01-289-1284