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 5950-00-184-5963
NSN 6110-01-315-1853
NSN 6645-01-241-2294
NSN 5835-00-419-0575
NSN 6240-01-309-1426
NSN 5905-00-870-3490
NSN 5999-01-585-0503
NSN 5999-01-650-6476
NSN 5975-01-237-2163
NSN 5855-01-330-1918
NSN 6145-00-957-5575
NSN 5895-01-481-4261