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 5855-01-498-1276
NSN 5835-01-515-6537
NSN 5965-01-184-2477
NSN 7035-00-252-7467
NSN 5950-00-452-4000
NSN 5998-01-256-4828
NSN 5905-01-303-6729
NSN 5930-01-242-4733
NSN 5998-01-175-1373
NSN 5930-01-529-8932
NSN 5996-00-804-2698
NSN 6320-00-313-9114