Copper Washers Our selection of copper washers are available in a variety of sizes to help achieve a wide range of sealing application requirements. M5 x 9 x 1mm Washer Our five-piece pack containing M5 x 1mm copper crush washers. M6 x 10 x 1mm Washer Our five-piece pack containing M6 x 1mm copper crush washers. M6 x 12 x 1mm Washer Our five-piece pack containing M6 x 1mm copper crush washers. M8 x 12 x 1mm Washer Our five-piece pack containing M8 x 1mm copper crush washers. M8 x 14 x 1mm Washer Our five-piece pack containing M8 x 1mm copper crush washers. M10 x 14 x 1MM Washer Our five-piece pack containing M10 x 1mm copper crush washers. M12 x 16 x 1MM Washer Our five-piece pack containing M12 x 1mm copper crush washers. M12 x 18 x 1.5MM Washer Our five-piece pack containing M12 x 1.5mm copper crush washers. M14 x 18 x 1MM Washer Our five-piece pack containing M14 x 1mm copper crush washers.