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 6145-01-578-1561
NSN 6650-01-343-4342
NSN 5915-00-553-8755
NSN 6320-00-831-2227
NSN 5965-01-559-5958
NSN 6650-01-044-4661
NSN 5910-00-676-9005
NSN 5965-01-176-1556
NSN 5950-01-277-3160
NSN 5945-00-781-7072
NSN 6240-01-502-7883
NSN 5935-01-530-1992