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 7035-00-480-6767
NSN 5965-01-352-1951
NSN 5965-01-030-0108
NSN 6130-01-656-0806
NSN 4140-01-601-7555
NSN 6105-00-189-0515
NSN 5965-01-289-5729
NSN 5935-01-517-2094
NSN 4140-01-644-2627
NSN 5975-01-406-0657
NSN 5996-00-636-4849
NSN 5930-00-701-6340