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 1/2 in, Inside Diameter 0.562 in, Outside Diameter 1 3/8 in, Maximum Thickness 1/8 in, System of Measurement Inch, Minimum Thickness 3/32 in, Color Silver, Inside Diameter Tolerance +0.015 in ; -0.005 in, Made in North America Not Made in North America, Manufacturer Location Globally Sourced, Maximum Temperature 302 Degrees F