Keyless Bushing Flange Type Not Applicable For Bore Diameter 45 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 37 471.132 psi Maximum Transmitted Torque 121 ft-lb Outside Diameter Tolerance +0/-.002 in