5/16" x 4" Round Toolbit Assab 17 AT100000 but include more grommets

but include more grommets

for starting threads - either second or bottoming taps should be used after to achieve desire thread depth

To make installation as straightforward as possible

Part Type: Exhaust Header

5/16" x 4" Round Toolbit Assab 17 AT100000 but include more grommetsMade of high cobalt alloy high speed steel, ASSAB 17 is well known worldwide for its excellent cutting properties, wear resistance, toughness and heat resistance. Its hardness has been carefully adjusted to 67 69 Rockwell C to give each ASSAB 17 tool bit optimal properties for its field of applications. High Co based high speed steel. Diameter; 5 16" Length; 4"