USS Washer, Flat Washer Type USS, Dimensional Standards ASME B18.21.1, USS, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, For Screw Size 1 in, Inside Diameter 1.062 in, Outside Diameter 2 1/2 in, Maximum Thickness 3/16 in, System of Measurement Inch, Minimum Thickness 9/64 in, Color Silver, Inside Diameter Tolerance +0.030 in ; -0.007 in, Made in North America Not Made in North America, Manufacturer Location Globally Sourced, Maximum Temperature 302 Degrees F