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 5985-00-222-6420
NSN 5835-01-258-5597
NSN 5920-00-084-0988
NSN 6220-01-202-6792
NSN 2925-00-523-7096
NSN 5910-01-309-4049
NSN 5996-00-338-9760
NSN 5895-00-013-9312
NSN 7035-01-485-5114
NSN 5855-01-053-9684
NSN 5945-01-525-7779
NSN 4140-01-251-6797