Keyless Bushing Flange Type Flanged For Bore Diameter 11/16 in Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 1 1/2 in Overall Width 1.22 in System of Measurement Inch Finish Zinc Plated Hub Contact Pressure 10 348 psi Maximum Transmitted Torque 1 876 ft-lb Outside Diameter Tolerance +/-0.003