Flat Washer,M4 F/W 4.3 X 14 X 2.5-3.4 3, Dimensional Standards AMPG 2001 FL.01, Material Stainless Steel, Material Grade/Class 316, Finish Plain, For Screw Size M4, Inside Diameter 4.3 mm, Outside Diameter 14 mm, Maximum Thickness 3 mm, System of Measurement Metric, Minimum Thickness 2.5 mm, Inside Diameter Tolerance +/-0.010 in, Made in North America Made in North America, Material Quality Standards ASTM A276, Outside Diameter Tolerance +/-0.010 in