Fender Washer, Flat Washer Type Oversized, Dimensional Standards ASME B18.21.1, Material Stainless Steel, Material Grade/Class 316, Finish Plain, For Screw Size 5/16 in, Inside Diameter 0.313 in, Outside Diameter 2 1/2 in, Maximum Thickness 0.065 in, System of Measurement Inch, Minimum Thickness 0.065 in, Color Silver, Inside Diameter Tolerance .348 +.010-.010 IN, Made in North America No, Manufacturer Location Made in USA, Material Quality Standards ASTM A240, Maximum Temperature 302 Degrees F