Rigid Shaft Coupling, 1 Piece Clamp, Inch, Bore Dia. 5/8 in x 3/4 in, Steel, Finish Black Oxide, Outside Dia. 1 13/16 in, Overall Length 1 13/16 in, With Keyway, Clearance Dia. 1.813 in, Screw Size 1/4 In. -28, Keyway Width 3/16 in, Max. Torque 1, 540 in-lb, Max. RPM 4, 000 RPM. This item has been restricted from sale in the following state (s): []