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 5895-01-052-2130
NSN 5905-00-281-5442
NSN 5960-01-243-0007
NSN 6610-00-276-8919
NSN 6145-00-155-5297
NSN 2925-01-604-8984
NSN 6105-01-500-3409
NSN 5965-01-284-3162
NSN 5999-01-277-5710
NSN 6685-01-659-3800
NSN 6150-01-233-6612
NSN 6110-01-095-1094