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 6645-01-195-6207
NSN 5990-01-395-4194
NSN 6685-01-462-7060
NSN 6645-01-234-7459
NSN 5965-01-148-4979
NSN 5915-01-436-3435
NSN 6645-01-627-8040
NSN 5910-01-555-1210
NSN 5910-01-556-8008
NSN 5998-00-405-3392
NSN 7035-00-275-5604
NSN 5930-00-240-6485