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 5965-01-263-8601
NSN 5965-01-266-7968
NSN 6145-01-499-3214
NSN 5990-01-481-3080
NSN 5910-01-275-2952
NSN 7035-00-360-2008
NSN 5935-01-204-2292
NSN 7035-01-004-8819
NSN 6105-00-123-6867
NSN 5915-01-348-4008
NSN 6685-01-499-6864
NSN 6610-01-564-0667