Sealing Washer, Sealing Washer Type Metal Bonded Washer, Finish Cadmium Plated, Metal Material Steel, Material Grade/Class Not Graded, For Screw Size 1 1/2 in, Inside Diameter 1.91 in, Outside Diameter 2.303 in, Maximum Thickness 0.108 in, Seal Material Buna-N, System of Measurement Inch, Pack Size Small Pack, Maximum Temperature 220 Degrees F, Minimum Temperature -40 Degrees F, Minimum Thickness 0.098 in, Seal Material Color Silver/Gold, Thickness Tolerance +/-0.008in