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 6105-00-359-9243
NSN 6650-00-397-6893
NSN 6620-00-967-3662
NSN 5965-00-281-0319
NSN 5920-01-406-8567
NSN 6320-01-547-9877
NSN 6620-00-485-4136
NSN 6105-01-025-1497
NSN 5950-01-427-3723
NSN 6150-01-544-8427
NSN 5975-01-548-0886
NSN 5835-01-203-7318