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 6105-01-283-3110
NSN 6105-01-471-8085
NSN 6105-01-619-9118
NSN 5990-01-116-2181
NSN 6650-00-296-4670
NSN 6240-01-104-5693
NSN 5930-00-277-4704
NSN 2925-01-381-5307
NSN 5998-01-495-0087
NSN 5905-00-102-4243
NSN 6150-01-165-4059
NSN 5975-00-054-9372