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 5998-01-599-9343
NSN 6220-01-361-8043
NSN 5895-00-467-1140
NSN 6110-01-192-3078
NSN 5950-01-571-6618
NSN 5930-01-096-1526
NSN 5925-01-446-5267
NSN 5895-00-238-4618
NSN 5990-01-271-8130
NSN 7035-00-834-2090
NSN 6105-00-079-0863
NSN 5935-00-463-9966