B58 Crank Bolts

With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head.

Zinc-plated steel screws resist corrosion in wet environments. 

The OE B58 Crank pulley fasteners may be fine for OE properties, and does not work well.  The Crank pulley is a 4-piece design friction welded together and specifically uses the 4 bolts to hold it all together.  We are seeing the pulleys come apart and is dangerous. Our fasteners are a must for big power B58 cars.

• Specifically designed to support the load and tensile requirements of increased output.

• Required to reach ASTM conformance certification.  All Material must conform to AMS batch raw materials.

• Thread engagement and shank is optimized for each given bolt in its specific location. 

• Meet or exceed a minimum allowable tensile strength of 170kpsi.  

This kit contains 4 bolts, use red loctite and torque to 55ft/lb