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 6105-01-381-1088
NSN 5950-01-440-4322
NSN 5945-00-780-9613
NSN 4140-00-958-9730
NSN 6620-01-618-2962
NSN 5965-01-507-3576
NSN 5920-01-292-2045
NSN 6105-01-501-2226
NSN 5920-00-081-9156
NSN 5996-00-954-0556
NSN 6320-00-681-1324
NSN 7035-01-261-9850