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 5996-00-506-0819
NSN 5965-01-276-4650
NSN 5910-00-045-7512
NSN 5950-01-334-1391
NSN 5835-01-524-4731
NSN 5925-00-269-2685
NSN 5960-00-827-5094
NSN 5996-01-461-8897
NSN 5835-01-268-1924
NSN 5935-01-332-4750
NSN 5999-00-753-7450
NSN 5920-01-298-1925