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 6145-01-102-2825
NSN 6145-01-579-3510
NSN 6620-01-381-6225
NSN 5930-01-317-3892
NSN 5965-01-231-9125
NSN 2925-01-228-6554
NSN 4140-01-634-0330
NSN 5998-00-820-5818
NSN 7035-01-219-9476
NSN 5935-01-349-9388
NSN 5905-01-157-6627
NSN 5835-01-131-2027