Keyed Shaft Collar, System of Measurement Inch, Bore Type Round Keyed, Bore Diameter 2 3/8 in, Bore Thread Size Not Applicable, Collar Outside Diameter 3 1/2 in, Inside Height to Flat Not Applicable, Clearance Diameter 3.71 in, Collar Width 3/4 in, Collar Material Carbon Steel, Keyway Width 5/8 in, Collar Material Grade 1215, Keyway Depth 5/16 in, Thread Direction Not Applicable, Center to Lever Top Not Applicable, Collar Construction 2-Piece, Screw Material Alloy Steel