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 5998-00-359-7814
NSN 6650-01-483-2399
NSN 5920-01-467-3246
NSN 5930-01-273-0152
NSN 6320-00-450-7014
NSN 5910-01-406-3505
NSN 5985-01-596-7971
NSN 5915-00-832-9581
NSN 5855-00-014-5008
NSN 5935-00-865-4174
NSN 5945-00-993-3078
NSN 5905-01-584-3124