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 5920-00-276-3403
NSN 7035-00-529-3128
NSN 6320-00-242-3300
NSN 5930-01-277-8735
NSN 6150-00-467-5808
NSN 5905-00-874-9517
NSN 6645-00-153-3834
NSN 6145-01-333-8191
NSN 5905-00-375-6342
NSN 5910-00-005-2800
NSN 6220-01-423-2814
NSN 5925-00-265-9488