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 5905-01-113-8242
NSN 5925-01-234-8312
NSN 5990-01-352-5255
NSN 5975-00-153-6775
NSN 4140-01-364-9797
NSN 6220-01-538-5493
NSN 7035-01-423-8343
NSN 6105-00-270-8078
NSN 5999-01-646-8395
NSN 5950-01-158-0288
NSN 5999-00-839-6478
NSN 6645-00-130-8464