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 6240-01-106-1508
NSN 2925-00-468-5273
NSN 6685-01-465-7661
NSN 5905-01-090-0792
NSN 5910-00-158-5389
NSN 5985-01-502-9010
NSN 5990-00-371-6590
NSN 5920-00-190-7466
NSN 6130-01-656-5223
NSN 5930-01-330-5938
NSN 5960-01-013-9346
NSN 5895-01-606-4543