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 6105-01-386-1529
NSN 6135-01-290-6487
NSN 5855-01-147-6024
NSN 6135-01-069-2482
NSN 5925-01-601-7768
NSN 6645-00-451-6462
NSN 5985-01-251-3717
NSN 5920-00-221-4556
NSN 5990-01-118-8624
NSN 5960-00-109-2806
NSN 6240-00-013-4764
NSN 6150-01-629-4053