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 5920-00-035-4846
NSN 6645-00-881-9339
NSN 5945-01-023-7993
NSN 6110-01-098-4803
NSN 5930-00-157-4559
NSN 6685-01-477-2349
NSN 6620-00-335-7437
NSN 5910-00-066-7435
NSN 5905-01-579-9149
NSN 5945-01-484-0145
NSN 5925-00-331-9297
NSN 6135-01-360-1620