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 5930-00-615-8465
NSN 7035-00-465-3298
NSN 5920-00-555-1877
NSN 5960-01-210-5587
NSN 5950-01-552-5036
NSN 5985-00-834-2521
NSN 7035-00-286-6221
NSN 5835-01-601-4411
NSN 5930-01-258-3672
NSN 6150-00-504-0934
NSN 6220-01-109-1798
NSN 5930-01-126-1541