Keyless Bushing, Flange Type Not Applicable, For Bore Diameter 3/8 in, Keyless Bushing Type Single Nut Locking Assembly, Material Steel, Outside Diameter 3/4 in, Overall Width 0.875 in, System of Measurement Inch, Finish Oil Dipped, Hub Contact Pressure 18,147 psi, Maximum Transmitted Torque 421 ft-lb, Outside Diameter Tolerance +/-0.0015