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 6105-01-264-5443
NSN 6650-00-555-1061
NSN 5996-01-189-6280
NSN 6220-01-452-0007
NSN 5835-01-412-0344
NSN 7035-01-365-6246
NSN 5960-00-490-0138
NSN 5905-00-298-1951
NSN 6145-00-140-8226
NSN 6240-01-417-2976
NSN 5965-01-096-7825
NSN 6145-00-463-8218