3/8-24, .750" underhead length
This set of bolts will fit Pro Series converters with Ford Bolt Patterns. 4 bolts per package. Package comes with shims to go between the converter pad and flexplate. You may or may not need these shims. Please measure for proper converter clearance. You will also get loctite in the package. We recommend that you loctite the bolts and torque to 45 ft/lbs.