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 5996-01-263-6776
NSN 6220-01-327-1025
NSN 5999-00-728-3617
NSN 5999-01-279-1070
NSN 5990-01-481-3080
NSN 6320-01-592-6248
NSN 7035-00-703-3535
NSN 6130-01-391-5991
NSN 7035-01-328-7448
NSN 6320-00-578-6898
NSN 5915-01-035-1928
NSN 5835-00-217-2147