Keyless Bushing Flange Type Not Applicable For Bore Diameter 1 5/16 in Keyless Bushing Type Single Nut Locking Assembly Material Steel Outside Diameter 2 3/8 in Overall Width 2.75 in System of Measurement Inch Finish Zinc Plated Hub Contact Pressure 10 540 psi Maximum Transmitted Torque 428 ft-lb Outside Diameter Tolerance +0.003 in