Keyless Bushing Flange Type Not Applicable For Bore Diameter 42 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 75 mm Overall Width 32 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 40 147.641 psi Maximum Transmitted Torque 113 ft-lb Outside Diameter Tolerance +0/-.002 in