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 5935-01-135-2960
NSN 5925-00-786-8123
NSN 6685-00-036-7120
NSN 6610-01-033-1748
NSN 6610-01-416-8384
NSN 5905-00-234-7543
NSN 5855-01-362-7066
NSN 5855-01-412-4623
NSN 5895-01-039-6971
NSN 5985-01-364-8213
NSN 5998-00-597-7175
NSN 5835-01-224-0406