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 5975-00-201-8826
NSN 6220-01-564-5391
NSN 5985-01-214-2384
NSN 6650-00-256-9059
NSN 5935-00-240-9500
NSN 5910-00-444-0829
NSN 5930-01-262-6310
NSN 5965-00-079-2360
NSN 6610-01-440-4314
NSN 5960-00-285-1001
NSN 6105-01-413-6995
NSN 5935-01-578-5057