Keyless Bushing Flange Type Not Applicable For Bore Diameter 25 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 50 mm Overall Width 34.5 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 30 271.844 psi Maximum Transmitted Torque 26 ft-lb Outside Diameter Tolerance +0/-.002 in