5 mm, System of Measurement Metric, Finish Oil Dipped, Hub Contact Pressure 28,830.002 in.327 psi, Maximum Transmitted Torque 48 ft-lb, Outside Diameter Tolerance +0/-.Keyless Bushing, Flange Type None, For Bore Diameter 35 mm, Keyless Bushing Type Multi-Screw Locking Assembly, Material Steel, Outside Diameter 60 mm, Overall Width 34.