Rigid Shaft Coupling, 1 Piece Clamp, Inch, Bore Dia. 1/2 in, Steel, Finish Black Oxide, Outside Dia. 1 1/4 in, Overall Length 1 7/8 in, Without Keyway, Clearance Dia. 1.25 in, Screw Size #8-32. This item has been restricted from sale in the following state (s): []