Sealing Washer Sealing Washer Type Metal Bonded Washer Finish Cadmium Plated Metal Material Steel Material Grade/Class Not Graded For Screw Size 3/8 in Inside Diameter 0.68 in Outside Diameter 0.94 in Maximum Thickness 0.09 in Seal Material Buna-N System of Measurement Inch Pack Size Small Pack Maximum Temperature 220 Degrees F Minimum Temperature -40 Degrees F Seal Material Color Silver/Gold Thickness Tolerance +/-0.008in