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 6130-01-024-1679
NSN 5905-00-018-0384
NSN 6105-00-175-9078
NSN 5996-00-924-7218
NSN 7035-00-803-3056
NSN 5960-01-099-9409
NSN 5998-00-398-0021
NSN 6650-01-338-6042
NSN 2925-01-069-5324
NSN 5965-00-348-4165
NSN 5999-01-322-4906
NSN 5998-01-039-6529