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 6105-01-099-1113
NSN 5999-01-584-8434
NSN 6610-01-428-7779
NSN 5965-00-680-9749
NSN 5996-01-278-5201
NSN 5960-01-442-9304
NSN 6135-00-044-3860
NSN 5960-01-053-4358
NSN 5930-01-496-6862
NSN 5905-01-093-8411
NSN 6220-00-149-0977
NSN 6320-01-648-5538