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 6685-01-076-2678
NSN 6150-01-032-2916
NSN 6240-00-106-8553
NSN 6110-01-522-0703
NSN 7035-01-141-3041
NSN 6610-01-622-4326
NSN 6645-01-119-3496
NSN 6105-00-542-7948
NSN 5835-01-576-9013
NSN 5905-00-521-4757
NSN 5855-01-453-1549
NSN 6130-01-523-1499