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 5960-01-034-6537
NSN 5990-01-407-6615
NSN 2925-00-127-5112
NSN 5930-01-113-1347
NSN 6150-00-861-1487
NSN 6105-01-273-0596
NSN 6645-01-076-4655
NSN 5905-01-133-5082
NSN 6220-01-462-4035
NSN 7035-00-193-2269
NSN 5960-01-121-4105
NSN 5910-01-571-9501