These seals are more commonly used in pumps, motors both electric & hydraulic, gearboxes & occasionally dirt wipers in hydraulic cylinders. They help protect shafts and bearings from dirt and harmful contaminants entering the internals of the application that they are fitted to, as well as prevent any leaks of lubricant.
Porcelain spark plugs also offer good electrical insulation properties. This is important for ensuring that the spark plug can generate and deliver a strong spark to ignite the air-fuel mixture• Super helix seal (seal with one-way two-step screw)
Furthermore, SC oil seals contribute to energy savings