Shaft Arbor, Fits Shaft Diameter 5/16 in, For Use With Smaller Fractional Horsepower Motors, Includes Flanged Washers, Hex Nut, Thread Length 1 1/8 in, Thread Size 3/8 In.-24 RH, Washer Outside Diameter 1 1/4 in, Maximum Wheel Width 1/2 in, Setscrew...