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 5895-01-590-9136
NSN 5855-01-658-4510
NSN 5895-01-383-9010
NSN 2925-00-103-6822
NSN 4140-01-129-8885
NSN 6135-01-069-2482
NSN 6130-00-733-5280
NSN 6150-01-261-0706
NSN 5945-01-381-6300
NSN 5975-01-176-0310
NSN 5998-01-065-2393
NSN 5998-01-553-6144