Keyless Bushing Flange Type Not Applicable For Bore Diameter 5/8 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 Zinc Plated Hub Contact Pressure 36 807 psi Maximum Transmitted Torque 169 ft-lb Outside Diameter Tolerance +0.003 in