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 2925-00-102-7701
NSN 5996-00-294-7045
NSN 5960-01-195-2166
NSN 5905-01-422-2597
NSN 5915-00-525-5753
NSN 6650-00-526-7785
NSN 5998-01-068-8211
NSN 5835-00-764-4388
NSN 5855-00-361-0167
NSN 6650-01-633-9147
NSN 5920-00-844-7354
NSN 6150-01-285-9860