Keyless Bushing Flange Type Not Applicable For Bore Diameter 2 7/8 in Keyless Bushing Type Single Nut Locking Assembly Material Steel Outside Diameter 3 7/8 in Overall Width 4.25 in System of Measurement Inch Finish Zinc Plated Hub Contact Pressure 4 577 psi Maximum Transmitted Torque 1 486 ft-lb Outside Diameter Tolerance +0.003 in