Rigid Shaft Coupling, 2 Piece Clamp, Inch, Bore Dia. 1 3/4 in, Steel, Finish Black Oxide, Outside Dia. 3 in, Overall Length 3 in, With Keyway, Clearance Dia. 3.0 in, Screw Size 5/16 In. -24, Keyway Width 3/8 in, Max. Torque 8, 310 in-lb, Max. RPM 4, 000 RPM. This item has been restricted from sale in the following state (s): []