Keyless Bushing Flange Type Not Applicable For Bore Diameter 25 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 21 029 psi Maximum Transmitted Torque 280 ft-lb Outside Diameter Tolerance +0.003 in