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 5960-01-237-8995
NSN 5895-01-396-8261
NSN 5999-01-351-1998
NSN 5985-00-055-1053
NSN 5985-01-124-1822
NSN 7035-01-492-6799
NSN 6220-01-110-3715
NSN 5910-00-522-4181
NSN 2925-01-562-8051
NSN 5920-00-411-5237
NSN 5998-01-273-5829
NSN 5935-00-265-0705