Rigid Shaft Coupling, 2 Piece Clamp, Inch, Bore Dia. 1 in x 1-1/2 in, Steel, Finish Black Oxide, Outside Dia. 2 15/16 in, Overall Length 2 15/16 in, Without Keyway, Clearance Dia. 2.938 in, Screw Size 5/16 In. -24, Max. Torque 4, 750 in-lb, Max. RPM 4, 000 RPM. This item has been restricted from sale in the following state (s): []