Rigid Shaft Coupling, 1 Piece Set Screw, Inch, Bore Dia. 7/8 in, Steel, Finish Black Oxide, Outside Dia. 1 3/4 in, Overall Length 2 in, With Keyway, Clearance Dia. 1.75 in, Screw Size 5/16 In. -18, Keyway Width 3/16 in. This item has been restricted from sale in the following state (s): []