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 6220-00-737-4872
NSN 4140-01-414-7093
NSN 6110-01-091-7827
NSN 5835-00-025-9951
NSN 5960-01-641-5493
NSN 5920-01-483-1104
NSN 5999-01-312-7569
NSN 6685-01-458-2859
NSN 5895-01-462-2764
NSN 6650-01-011-9093
NSN 2925-01-426-3410
NSN 6220-00-489-8571