Flat Washer Flat Washer Type SAE Dimensional Standards ASME B18.21.1 SAE Material Stainless Steel Material Grade/Class 316 Finish Plain For Screw Size 1 1/2 in Inside Diameter 1.625 in Outside Diameter 3 in Maximum Thickness 0.192 in System of Measurement Inch Minimum Thickness 0.136 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