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 6645-01-305-9135
NSN 6240-01-562-6938
NSN 5999-00-240-4354
NSN 7035-00-703-3535
NSN 6650-00-925-1274
NSN 5999-01-532-3076
NSN 6610-01-487-3794
NSN 6240-01-172-9897
NSN 5990-01-144-4674
NSN 6610-01-588-1148
NSN 5920-01-319-9662
NSN 5996-01-179-2681