Flat Washer Flat Washer Type Standard Dimensional Standards ANSI B18.22.1 Material PEEK Material Grade/Class Grade 2 Finish Plain For Screw Size M14 Inside Diameter 14.5 mm Outside Diameter 28 mm Maximum Thickness 2.4 mm System of Measurement Metric Minimum Thickness 2.4 mm Color Brown Maximum Temperature 500 Degrees F Minimum Temperature -50 Degrees F Pack Size Small Pack Rockwell Hardness D87.5 Thickness Tolerance +/-0.5mm Package Quantity 10