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 6685-01-485-0003
NSN 5915-00-886-5474
NSN 2925-00-233-5644
NSN 5999-00-413-1343
NSN 6130-01-037-7326
NSN 6240-00-770-7647
NSN 5996-00-581-5810
NSN 5920-00-814-2328
NSN 5910-01-485-1118
NSN 5975-01-411-4728
NSN 6105-00-099-8818
NSN 6130-01-015-9447