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 5835-00-034-4976
NSN 6135-01-495-0933
NSN 6135-01-050-3194
NSN 5910-00-296-8816
NSN 5998-00-400-5265
NSN 6650-01-071-1234
NSN 6620-01-090-3803
NSN 6130-00-848-5480
NSN 5999-01-610-6209
NSN 5935-01-288-0589
NSN 5895-00-874-0324
NSN 6220-01-025-0482