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 5975-00-464-7535
NSN 5915-01-250-1217
NSN 5960-01-411-5899
NSN 6220-01-023-8818
NSN 6135-01-586-5018
NSN 6110-01-425-1449
NSN 5925-01-474-6615
NSN 5990-01-485-0260
NSN 5915-01-408-6647
NSN 7035-01-023-1008
NSN 6150-00-233-0820
NSN 5895-01-191-3459