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 5945-01-392-0898
NSN 6105-01-648-4431
NSN 5910-01-440-8395
NSN 6650-01-165-2175
NSN 6620-01-345-9488
NSN 5925-01-306-4454
NSN 7035-01-024-9511
NSN 5998-00-721-4701
NSN 5999-00-782-8314
NSN 5945-01-312-0582
NSN 5895-01-634-0630
NSN 4140-00-205-6491