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 6110-01-521-1001
NSN 6130-01-022-2827
NSN 5965-01-286-6548
NSN 5945-01-397-5602
NSN 5975-01-210-5079
NSN 5905-01-247-6734
NSN 5950-00-147-9587
NSN 6135-00-542-6216
NSN 5915-01-224-5594
NSN 5975-01-612-7257
NSN 6645-01-063-8243
NSN 5910-01-196-9389