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 5930-01-497-6067
NSN 5996-00-021-5624
NSN 6130-01-510-4203
NSN 5996-01-322-4838
NSN 5985-01-459-8441
NSN 6610-00-169-4195
NSN 6650-01-645-6876
NSN 5950-01-304-7497
NSN 6135-01-186-4010
NSN 5930-01-229-7534
NSN 6610-01-626-2327
NSN 5920-00-626-8328