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 5835-01-307-2009
NSN 5835-00-034-4976
NSN 5935-01-240-7551
NSN 5965-01-069-5650
NSN 5935-01-044-1612
NSN 6645-01-424-1540
NSN 5915-00-263-2175
NSN 5920-01-409-2830
NSN 5990-01-595-4584
NSN 5950-01-025-1649
NSN 5935-01-318-1721
NSN 5975-00-817-1781