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 6105-01-585-3556
NSN 5945-00-240-3228
NSN 6145-00-526-3056
NSN 4140-01-435-6540
NSN 6645-01-424-9415
NSN 5998-00-679-4001
NSN 5965-00-680-9749
NSN 5935-01-180-0085
NSN 5905-01-290-7030
NSN 5915-00-912-4098
NSN 5965-01-505-3716
NSN 5925-01-200-2714