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 6110-00-925-7410
NSN 5920-01-288-8862
NSN 6650-01-539-4720
NSN 2925-00-096-5526
NSN 5965-01-659-8389
NSN 6320-01-462-2295
NSN 5990-01-333-6583
NSN 5855-00-051-2792
NSN 5965-01-172-5724
NSN 5960-00-263-0106
NSN 5950-00-567-2580
NSN 5996-01-473-2183