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 5985-00-930-6407
NSN 6220-01-190-0627
NSN 6150-01-045-7088
NSN 6620-01-091-1038
NSN 5910-01-160-6988
NSN 5996-00-107-2499
NSN 5985-01-500-7413
NSN 5895-01-015-6247
NSN 6240-01-326-3040
NSN 6145-01-594-9092
NSN 6145-00-459-4899
NSN 5945-01-280-9963