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 5990-00-636-4218
NSN 6105-00-980-2695
NSN 5950-01-412-1194
NSN 6220-01-386-6510
NSN 6240-00-810-3774
NSN 4140-01-232-8784
NSN 5930-01-420-6529
NSN 4140-01-483-0926
NSN 5990-01-265-8082
NSN 6650-01-240-1235
NSN 5985-01-381-1540
NSN 5945-00-155-4290