Sealing Washer Sealing Washer Type Metal Bonded Washer Finish Cadmium Plated Metal Material Steel Material Grade/Class Not Graded For Screw Size M26 Inside Diameter 26.924 mm Outside Diameter 35.052 mm Maximum Thickness 2.74 mm Seal Material Buna-N System of Measurement Metric Pack Size Small Pack Maximum Temperature 220 Degrees F Minimum Temperature -40 Degrees F Minimum Thickness 2.5 mm Seal Material Color Silver/Gold Thickness Tolerance +/-0.20 mm