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 5910-01-537-5268
NSN 5960-01-233-6124
NSN 5930-00-734-9849
NSN 4140-01-552-0930
NSN 5915-01-642-0016
NSN 6220-01-285-5704
NSN 2925-01-583-5619
NSN 5998-00-633-5169
NSN 6105-00-519-0941
NSN 6220-01-054-2804
NSN 6220-01-047-4060
NSN 6110-01-477-3003