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 6150-01-218-4974
NSN 6240-01-317-8783
NSN 5985-00-564-4102
NSN 7035-01-038-9970
NSN 6110-00-285-1895
NSN 5915-01-290-5847
NSN 5965-00-877-9197
NSN 5975-01-023-1977
NSN 5905-00-582-7031
NSN 5835-01-352-7211
NSN 6240-00-801-8002
NSN 5998-01-316-3542