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 5985-01-161-4140
NSN 7035-00-991-6877
NSN 6130-00-947-9232
NSN 5960-01-328-8248
NSN 5930-01-367-2184
NSN 5910-01-352-9332
NSN 5996-00-962-8775
NSN 6105-01-175-3077
NSN 5950-00-422-8579
NSN 6105-00-951-7100
NSN 5915-00-147-4535
NSN 5945-01-072-1668