Keyless Bushing Flange Type Not Applicable For Bore Diameter 20 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 47 mm Overall Width 26 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 35 913.002 psi Maximum Transmitted Torque 20 ft-lb Outside Diameter Tolerance +0/-.002 in