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 6620-01-100-8899
NSN 6110-01-346-0028
NSN 7035-01-476-4085
NSN 6220-01-458-0909
NSN 2925-00-827-2326
NSN 7035-01-023-1008
NSN 5915-01-462-4225
NSN 5935-00-955-6800
NSN 6645-01-633-1852
NSN 5855-01-584-5397
NSN 5935-00-523-8942
NSN 5975-01-340-5129