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 2925-01-540-7389
NSN 5855-00-916-2236
NSN 6145-00-880-6382
NSN 6240-01-272-4037
NSN 5915-01-523-6164
NSN 4140-00-005-4574
NSN 5895-01-431-6530
NSN 5895-01-286-8272
NSN 6320-01-462-2295
NSN 5990-01-564-6173
NSN 5905-00-295-8630
NSN 2925-01-043-9786