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 6145-00-148-5748
NSN 5998-00-099-5755
NSN 5975-01-510-9722
NSN 5905-01-231-9626
NSN 6130-01-223-8603
NSN 5975-01-468-8744
NSN 6645-01-357-7750
NSN 6135-01-268-7056
NSN 5960-00-597-2680
NSN 5835-01-376-8454
NSN 5999-01-226-0977
NSN 5950-01-382-0522