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 5925-01-358-0308
NSN 5985-00-237-2403
NSN 7035-01-254-3606
NSN 6145-00-574-1152
NSN 5999-01-251-8092
NSN 5996-01-535-0963
NSN 6105-01-437-9990
NSN 5925-01-475-5261
NSN 5910-01-614-4092
NSN 6610-01-503-0153
NSN 5950-00-170-5041
NSN 6110-01-048-7725