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 6320-00-682-3448
NSN 5910-01-529-2417
NSN 6145-01-023-2616
NSN 5985-00-911-0551
NSN 5895-01-605-4296
NSN 5835-01-250-2939
NSN 5835-01-390-4667
NSN 5895-00-119-8600
NSN 6130-01-149-4863
NSN 5835-01-642-4705
NSN 5895-01-216-1184
NSN 5996-01-252-6262