Keyless Bushing Flange Type Not Applicable For Bore Diameter 19 mm Keyless Bushing Type Single Nut Locking Assembly Material Steel Outside Diameter 38 mm Overall Width 38.1 mm System of Measurement Metric Finish Zinc Plated Hub Contact Pressure 30 746 psi Maximum Transmitted Torque 204 ft-lb Outside Diameter Tolerance +0.003 in