The metal case is the exterior (or frame) of the oil seal, the principal function of which is to give rigidity and strength to the seal. The material of the case must be selected depending on the environment where the seals are to be used. Often the metal case is covered by the same rubber material used in the sealing element, which also helps seal the exterior of the oil seal in the housing bore. Common case material types are:
Spark plugs are an essential component in any combustion engine, igniting the fuel-air mixture to create the power necessary to drive a vehicle. As such, it is crucial to ensure that you are using high-quality spark plugs from reliable suppliers to ensure optimal engine performance.