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 5960-01-599-9821
NSN 5985-01-441-1814
NSN 6105-01-423-6072
NSN 5985-01-114-7130
NSN 5996-00-185-1372
NSN 2925-00-486-8640
NSN 6130-01-445-2419
NSN 5999-01-514-8024
NSN 5975-01-346-6740
NSN 5895-01-532-4821
NSN 5950-01-607-2020
NSN 5920-00-681-6464