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 6150-00-447-0081
NSN 5950-01-459-7961
NSN 6110-00-081-9902
NSN 5930-01-259-1859
NSN 5945-00-099-9857
NSN 6685-01-486-2737
NSN 5998-00-892-8438
NSN 5998-01-069-9206
NSN 6150-01-655-7724
NSN 5835-01-495-5986
NSN 5905-01-341-7493
NSN 5975-01-565-3020