Effective on hard and soft shafts Design fully engages the shaft without marring High axial load and torque capacity Recessed screw head provides an outside surface free of major projection for safety Black oxide provides some corrosion resistance

Rigid Shaft Coupling, 2 Piece Clamp, Inch, Bore Dia. 1-3/4 In., Steel, Finish Black Oxide, Outside Dia. 3 In., Overall Length 3 In., With Keyway, Clearance Dia. 3.000 In., Screw Size 5/16 In.-24, Keyway Width 3/8 In., Max. Torque 8310 in.-lb., Max. RPM 4000