Annular gaskets are used to seal the system which helps to make it an efficient and reliable machine in the industrial domain. They are suitable for a wide range of applications such as maintenance, repair and overhaul (MRO) activities in industries such as oil & gas, mining, power generation, airports and defense. Annular gasket, a small, rubber-like ring that seals the end of an engine or other small device by applying pressure and/or friction. The term annular also applies to a similar item in a larger size. It is used to form rings around bearings or other rotating function components. Annular gaskets (also known as ANs) are used to seal an interface between two components in an engine, transmission or other machine. They are made from galvanized steel and provide long-term wear protection for the unit being connected.