[ Ссылка ]
This video describes special nitric acid and corrosion resistant washers whose characteristics are provided by the material the washers are made – Grade 430 stainless steel. 430 stainless steel washers are the practical fastening / sealing hardware for innumerable industrial applications. Unlike the other stainless steel grades, 430 stainless steel washers have properties that can withstand moderate heat or temperature. This specific grade of stainless steel has good mechanical properties, thus making washers made from this material the favored fastening / sealing hardware for commercial and industrial equipment use.
