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 5975-01-530-4972
NSN 5935-00-734-8560
NSN 6110-00-077-1811
NSN 6220-01-174-8114
NSN 6620-00-216-6416
NSN 5960-00-253-1473
NSN 2925-00-724-9252
NSN 5975-01-516-7373
NSN 7035-01-423-8343
NSN 5905-01-302-7132
NSN 6130-01-600-8887
NSN 5999-00-736-4198