Keyless Bushing, Flange Type Not Applicable, For Bore Diameter 1/4 in, Keyless Bushing Type Single Nut Locking Assembly, Material Steel, Outside Diameter 5/8 in, Overall Width 0.75 in, System of Measurement Inch, Finish Oil Dipped, Hub Contact Pressure 11,316 psi, Maximum Transmitted Torque 125 ft-lb, Outside Diameter Tolerance +/-0.0015