Rigid Shaft Coupling, 1 Piece Set Screw, Inch, Bore Dia. 1/2 in, Stainless Steel, Finish Plain, Outside Dia. 1 in, Overall Length 1 1/2 in, With Keyway, Clearance Dia. 1.0 in, Screw Size 1/4 In. -20, Keyway Width 1/8 in, Max. Torque 138 in-lb, Max. RPM 3, 500 RPM. This item has been restricted from sale in the following state (s): []