Fractional HP Motor Shaft Arbor, Thread 1/2-20LH, Maximum Wheel Width 1 1/4 Inches, Overall Length 3 1/2 Inches, Thread Length 1 13/16 Inches, Washer Diameter 1 1/2 Inches, Fits Shaft Diameter 5/8 Inch, 3/16 Inch Keyway, With Nut, Washers and Keyway