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 5835-01-203-8295
NSN 5960-00-224-6828
NSN 5935-00-115-0039
NSN 6650-01-653-5576
NSN 6220-01-431-2066
NSN 2925-00-940-8231
NSN 5990-01-376-0405
NSN 5975-00-110-8148
NSN 5905-01-170-3453
NSN 5855-00-079-2370
NSN 5996-01-412-0813
NSN 5945-00-455-4556