Flat Washer, Flat Washer Type Standard, Dimensional Standards ASME B18.22.1, Material Stainless Steel, Material Grade/Class 316, Finish Plain, For Screw Size 1 in, Inside Diameter 1.063 in, Outside Diameter 2 1/2 in, Maximum Thickness 0.17 in, System of Measurement Inch, Minimum Thickness 0.115 in, Color Silver, Inside Diameter Tolerance +0.030 in ; -0.007 in, Made in North America No, Manufacturer Location Globally Sourced, Maximum Temperature 302 Degrees F, Minimum Temperature -58 Degrees F