Shaft Collar, System of Measurement Inch, Bore Type Round Keyed, Bore Diameter 2 in, Bore Thread Size Not Applicable, Collar Outside Diameter 3 in, Inside Height to Flat Not Applicable, Clearance Diameter 3.27 in, Collar Width 11/16 in, Collar Material Carbon Steel, Keyway Width 1/2 in, Collar Material Grade 1215, Keyway Depth 1/4 in, Thread Direction Not Applicable, Center to Lever Top Not Applicable, Collar Construction 2-Piece, Screw Material Alloy Steel, Screw Material Finish Black Oxide