Flat Washer Flat Washer Type Standard Dimensional Standards ASME B18.22.1 Material Stainless Steel Material Grade/Class 316 Finish Plain For Screw Size 7/16 in Inside Diameter 0.469 in Outside Diameter 29/32 in Maximum Thickness 0.047 in System of Measurement Inch Minimum Thickness 0.047 in Color Silver Inside Diameter Tolerance +.015/-.005 Made in North America No Maximum Temperature Not Applicable Minimum Temperature Not Applicable Outside Diameter Tolerance +.015/-.007