Metal ring gaskets, also known as metal interface gaskets, are made of various materials of metals and are mechanically cut and processed by high-precision CNC lathes. They come in various forms of metal sealing gaskets with small installation areas and high pre-tightening pressure. They are mainly used in the joints of machines in high-temperature, high-pressure and corrosive pipelines (such as steam and petroleum industries, petroleum chemical industries) for towers, tanks, heat exchangers, pressure vessels, valves, cylinder heads, etc.

Metal ring gaskets are classified by cross-section into several forms including elliptical gaskets, octagonal gaskets, special forms of octagonal gaskets RX type and BX type lens gaskets.