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 5965-00-798-3597
NSN 6645-00-079-1430
NSN 6135-00-998-5884
NSN 5920-00-419-5382
NSN 5985-01-616-4916
NSN 5930-01-173-4036
NSN 5930-01-135-0096
NSN 6320-01-411-7469
NSN 6240-01-586-4995
NSN 5895-00-684-2270
NSN 5895-01-258-5671
NSN 6150-01-291-3145