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 6685-01-228-5332
NSN 6130-01-634-0603
NSN 5945-00-786-6655
NSN 5999-01-163-8187
NSN 5985-01-102-2903
NSN 6150-01-423-8870
NSN 5895-00-960-7403
NSN 5910-00-010-1690
NSN 2925-00-278-9468
NSN 5935-01-265-0858
NSN 5905-00-532-2453
NSN 5996-01-140-4424