Rigid Shaft Coupling, 1 Piece Set Screw, Inch, Bore Dia. 2 in, Steel, Finish Black Oxide, Outside Dia. 3 5/16 in, Overall Length 4 1/2 in, With Keyway, Clearance Dia. 3.313 in, Screw Size 1/2 In. -13, Keyway Width 1/2 in. This item has been restricted from sale in the following state (s): []