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 5950-01-051-8285
NSN 5895-01-200-7150
NSN 5985-00-111-3503
NSN 5920-01-281-7354
NSN 6145-01-192-2087
NSN 6685-01-501-9675
NSN 2925-00-265-7539
NSN 5998-01-173-1933
NSN 5950-01-437-8873
NSN 5950-01-437-8873
NSN 5920-00-906-2500
NSN 5895-01-268-4634