Keyless Bushing Flange Type Not Applicable For Bore Diameter 20 mm Keyless Bushing Type Single Nut Locking Assembly Material Steel Outside Diameter 45 mm Overall Width 47.6 mm System of Measurement Metric Finish Zinc Plated Hub Contact Pressure 26 250 psi Maximum Transmitted Torque 224 ft-lb Outside Diameter Tolerance +0.003 in