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 6110-00-202-2990
NSN 6110-01-451-4326
NSN 5999-01-358-2791
NSN 5895-00-222-5043
NSN 5915-00-452-2227
NSN 5999-01-462-4628
NSN 5835-01-132-5894
NSN 6150-01-236-7080
NSN 5930-01-449-1265
NSN 6150-01-070-5953
NSN 6110-01-441-1024
NSN 6685-01-218-8120