Flat Washer, Dimensional Standards AMPG 2001 FL.01, For Screw Size #10, Inside Diameter 0.203 in, Outside Diameter 3 in, Maximum Thickness 1/32 in, System of Measurement Inch, Minimum Thickness 1/32 in, Inside Diameter Tolerance +/-0.010 in, Made in North America Made in North America, Material Quality Standards Not Applicable, Outside Diameter Tolerance +/-0.010 in, Resistance Properties Chemical-Resistant, Nonconductive