Keyless Bushing B-LOC Shaft Dia 20mm Shaft Dia Tolerance +0/-.05mm Outside Dia 47mm Overall Length 20mm Transmissible Torque 247.096 Ft.-Lbs. Transmissible Thrust 7551.225 Lbs. Hub Contact Pressure 16099.218 PSI Locking Bolt Quantity 8 Bolt Size M6 x 18 Steel Material