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 5905-01-408-6850
NSN 6220-01-186-5930
NSN 6645-01-091-9363
NSN 6145-01-311-6386
NSN 6130-01-334-4366
NSN 5960-00-443-9452
NSN 5835-00-289-9080
NSN 6135-00-235-1938
NSN 5910-00-266-0920
NSN 6650-00-724-8258
NSN 6220-01-417-5491
NSN 6105-01-338-2576