Keyless Bushing Flange Type Not Applicable For Bore Diameter 3/4 in Keyless Bushing Type Single Nut Locking Assembly Material Steel Outside Diameter 1 1/2 in Overall Width 1.5 in System of Measurement Inch Finish Oil Dipped Hub Contact Pressure 11 000 psi Maximum Transmitted Torque 208 ft-lb Outside Diameter Tolerance +/-0.003