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 4140-00-235-6377
NSN 5999-01-519-9353
NSN 5835-01-492-3143
NSN 5950-00-100-5267
NSN 5990-00-341-3194
NSN 5835-01-277-0710
NSN 6130-00-516-1495
NSN 5998-01-064-3938
NSN 5905-00-740-8205
NSN 5990-00-288-1820
NSN 5960-01-200-4621
NSN 5935-01-270-0378