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 5905-00-451-3354
NSN 6150-01-023-7710
NSN 5985-00-470-2194
NSN 5998-01-111-8946
NSN 5930-01-457-3610
NSN 6110-01-613-4711
NSN 5975-01-398-9128
NSN 6240-00-573-7514
NSN 5975-00-827-7426
NSN 5905-01-521-3839
NSN 6145-01-568-9199
NSN 4140-01-384-2351