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 5965-00-959-4910
NSN 5965-01-595-6134
NSN 6240-01-217-0432
NSN 5920-00-116-4959
NSN 6650-01-029-2995
NSN 5920-01-360-5681
NSN 6135-00-209-6918
NSN 6150-01-497-5255
NSN 6610-00-552-6332
NSN 5915-01-025-6169
NSN 5935-01-431-7503
NSN 5985-01-399-8739