Sealing Washer, Sealing Washer Type Metal Bonded Washer, Finish Cadmium Plated, Metal Material Steel, Material Grade/Class Not Graded, For Screw Size M42, Inside Diameter 42.672 mm, Outside Diameter 53.086 mm, Maximum Thickness 2.4 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 3.4 mm, Seal Material Color Silver/Gold, Thickness Tolerance +/-0.20 mm