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 5835-01-446-6065
NSN 6610-01-473-5678
NSN 5935-01-124-4282
NSN 6650-00-005-6649
NSN 5905-01-496-0209
NSN 5990-01-251-2296
NSN 7035-01-123-8723
NSN 5910-01-267-7124
NSN 6620-01-019-6952
NSN 5930-00-297-2599
NSN 6650-01-372-4990
NSN 5985-01-364-1149