'Rigid Shaft Coupling, Two Piece Clamp Type, With Keyway, Bore Dia. 1 In. x 1 In., Overall Length 2 In., Outside Dia. 2 In., Clearance Dia. (In.) 2, Screw Size (In.) 1/4-28 x 5/8, Keyway Width (In.) 1/4, Max. Torque (In.-Lbs.) 2470, Max. RPM 4000, Steel Material'