Keyless Bushing Flange Type Not Applicable For Bore Diameter 38 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 75 mm Overall Width 62 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 42 930.835 psi Maximum Transmitted Torque 168 ft-lb Outside Diameter Tolerance +0/-.002 in