Keyless Bushing Flange Type Not Applicable For Bore Diameter 2 1/2 in Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 3 47/64 in Overall Width 1.358 in System of Measurement Inch Finish Oil Dipped Hub Contact Pressure 24 609 psi Maximum Transmitted Torque 2 846 ft-lb