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 6240-01-446-6315
NSN 5998-01-643-7620
NSN 5965-01-618-9836
NSN 5999-00-148-4559
NSN 5975-01-633-4430
NSN 5910-01-261-0596
NSN 5905-01-499-4695
NSN 5855-01-634-0259
NSN 5965-01-418-7226
NSN 6610-00-913-1704
NSN 5975-01-348-6127
NSN 5996-01-463-3152