A hardened cylindrical fastener with multiple spiral flutes on its shank. It also has an end smaller in diameter than the outside diameter of the spiral flutes, which acts as a pilot when driven into a drilled hole.
NSN 5999-01-372-1182
NSN 5965-01-360-6568
NSN 2925-01-572-0539
NSN 6130-00-053-1069
NSN 5990-01-461-8969
NSN 5835-00-706-0829
NSN 6240-01-337-2034
NSN 5999-00-251-7817
NSN 5999-00-661-0954
NSN 6130-01-529-3871
NSN 5998-00-432-3454
NSN 6645-01-418-1657