Keyed Shaft Collar, System of Measurement Inch, Bore Type Round Keyed, Bore Diameter 1 7/8 in, Bore Thread Size Not Applicable, Collar Outside Diameter 2 7/8 in, Inside Height to Flat Not Applicable, Clearance Diameter 3.16 in, Collar Width 11/16 in, Collar Material Stainless Steel, Keyway Width 1/2 in, Collar Material Grade 303, Keyway Depth 1/4 in, Thread Direction Not Applicable, Center to Lever Top Not Applicable, Collar Construction 2-Piece, Screw Material Stainless Steel