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Flat washer is a common sealing element used to provide an average pressure distribution at bolt, nut, or threaded connections, preventing loosening, water leakage, or loosening. Flat washers are usually made of stainless steel and carbon steel materials. The selection of materials depends on the specific application requirements, including temperature, pressure, and chemical properties. Flat washers can be surface treated to enhance their corrosion resistance and sealing performance. Common surface treatment methods include coating, galvanizing, gluing, etc.
