Octagonal Ring Shim is mainly used in high-precision equipment, machinery and electronic products to adjust wheelbase, increase fastening area, disperse pressure, chamber sealing, etc. They are widely used in electronics, communications , aerospace, machinery, scientific research, robotics and artificial intelligence, new energy, medical and other industries, the materials used are varied according to the application and function, such as the electronic industry is mostly made of ultra-thin stainless steel 304, brass, beryllium copper, aluminum Gaskets, copper, aluminum, stainless steel, titanium are often used in the communication industry, titanium, aluminum molybdenum, tungsten and other special metals are used in the aviation industry, various types of stainless steel, high carbon steel, and spring steel are used in the machinery industry, and ultra-thin stainless steel is often used in the scientific research industry. , beryllium copper, titanium, molybdenum, tungsten and other metals, the robot industry will use titanium, copper, stainless steel, etc., the new energy industry often uses titanium, stainless steel, copper and other alloys, the medical industry commonly uses stainless steel 301, titanium and other metal materials. Brake disc washer is a friction material fixed on the brake drum or brake disc that rotates with the wheel. The friction lining and the friction pad are subjected to external pressure to generate friction to achieve the purpose of vehicle deceleration. Some require heat treatment to make the gasket stronger and wear-resistant, and some require electroplating or PVD treatment on the surface, which not only has a beautifying effect, but also increases the service life of the gasket.