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 6105-00-434-8987
NSN 6620-01-651-5425
NSN 6110-00-923-7265
NSN 5930-01-387-3363
NSN 6135-00-271-0407
NSN 5990-01-537-1553
NSN 5935-00-887-6700
NSN 7035-00-703-3535
NSN 6240-00-984-3354
NSN 2925-01-495-2690
NSN 5930-01-092-5064
NSN 6240-00-891-8586