Keyless Bushing Flange Type Flanged For Bore Diameter 1 1/2 in Keyless Bushing Type Multi-Screw Locking Assembly Material Carbon Steel Outside Diameter 2 9/16 in Overall Width 1.26 in System of Measurement Inch Hub Contact Pressure 18 116 psi Maximum Transmitted Torque 682 ft-lb Outside Diameter Tolerance +.0018 in