Flat Washer, Flat Washer Type Standard, Dimensional Standards ASME B18.22.1, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, For Screw Size 1/4 in, Inside Diameter 0.281 in, Outside Diameter 5/8 in, Maximum Thickness 0.063 in, System of Measurement Inch, Minimum Thickness 0.034 in, Color Silver, Inside Diameter Tolerance +0.015 in ; -0.005 in, Made in North America No, Manufacturer Location Globally Sourced, Maximum Temperature 302 Degrees F, Minimum Temperature -58 Degrees F