SAE Washer, Flat Washer Type SAE, Dimensional Standards ASME B18.21.1, Material Steel, Material Grade/Class Case Hardened, Finish Zinc-Plated, For Screw Size 1 1/2 in, Inside Diameter 1.625 in, Outside Diameter 3 in, Maximum Thickness 3/16 in, System of Measurement Inch, Minimum Thickness 9/64 in, Color Silver, Inside Diameter Tolerance 1.618-1.655, Made in North America Not Made in North America, Manufacturer Location Globally Sourced, Material Quality Standards Not Rated