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 6685-01-372-6010
NSN 5925-00-521-6100
NSN 5920-00-407-5492
NSN 5925-00-499-9220
NSN 5925-01-176-3153
NSN 6135-01-448-4680
NSN 6610-01-620-7711
NSN 5975-01-481-2646
NSN 5965-01-381-4879
NSN 6650-01-633-9147
NSN 6320-01-116-3980
NSN 5930-01-448-0124