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 6145-01-478-1722
NSN 6685-00-540-9017
NSN 5895-01-449-2804
NSN 6150-01-437-0260
NSN 6645-00-795-5565
NSN 6220-00-788-1178
NSN 6135-01-242-2304
NSN 5965-01-485-0618
NSN 6685-01-620-6065
NSN 5935-01-370-6473
NSN 5996-00-397-4318
NSN 5999-01-646-3851