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 5895-00-100-1216
NSN 5945-00-916-4035
NSN 7035-01-024-9511
NSN 5945-01-025-5956
NSN 5835-01-381-2683
NSN 6220-00-501-2867
NSN 6150-00-456-4526
NSN 5950-00-857-1957
NSN 6610-01-464-3037
NSN 6130-01-245-8407
NSN 6135-01-421-7168
NSN 6145-00-199-8066