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 5985-00-466-3574
NSN 6610-01-395-9324
NSN 5910-01-294-8321
NSN 6145-01-023-7719
NSN 7035-01-196-3445
NSN 5945-01-158-6075
NSN 5930-01-014-6947
NSN 5935-01-294-0548
NSN 5985-00-577-2920
NSN 6620-01-138-0089
NSN 5930-01-183-9379
NSN 6130-01-025-6770