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 6110-01-222-2027
NSN 5920-00-413-3341
NSN 2925-01-008-5696
NSN 6145-00-435-4013
NSN 5990-00-840-6571
NSN 5910-01-324-6018
NSN 5945-01-007-6649
NSN 5910-01-653-6462
NSN 5996-00-552-1406
NSN 5910-00-374-5048
NSN 7035-00-849-5526
NSN 6620-01-631-5936