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 5960-01-338-3412
NSN 5965-01-058-6285
NSN 5950-00-223-3204
NSN 5999-01-058-5181
NSN 5990-01-271-1628
NSN 6130-01-227-9683
NSN 5975-01-364-8642
NSN 5920-00-269-6178
NSN 6320-01-183-8196
NSN 5905-01-168-7806
NSN 5910-01-564-5842
NSN 5835-00-794-7500