Shaft Collar System of Measurement Inch Bore Type Round Bore Diameter 2 in Bore Thread Size Not Applicable Collar Outside Diameter 3 in Inside Height to Flat Not Applicable Clearance Diameter 3.31 in Collar Width 11/16 in Collar Material Plastic Keyway Width Not Applicable Collar Material Grade Acetal Keyway Depth Not Applicable Thread Direction Not Applicable Center to Lever Top Not Applicable Collar Construction 2-Piece Screw Material Stainless Steel