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 6645-00-551-8291
NSN 5999-00-661-0954
NSN 6685-01-276-6598
NSN 5895-01-322-4953
NSN 6135-00-078-9931
NSN 5855-00-198-3197
NSN 6620-01-275-9777
NSN 5895-01-007-4497
NSN 7035-00-155-9513
NSN 6620-01-023-2938
NSN 5935-01-213-4256
NSN 5985-01-020-7894