Flat Washer, Flat Washer Type Oversized, Dimensional Standards ASME B18.21.1, Material Steel, Finish Zinc-Plated, For Screw Size 3/8 in, Inside Diameter 0.438 in, Outside Diameter 1 in, Maximum Thickness 5/64 in, System of Measurement Inch, Minimum Thickness 5/64 in, Color Silver, Inside Diameter Tolerance 0.433-0.453, Made in North America Not Made in North America, Manufacturer Location Globally Sourced, Material Quality Standards Not Rated, Maximum Temperature 350 Degrees C