-20~180 DIN
Nitrile rubber (NBR)
Oil - Overall, aircraft spark plugs are a critical component of the ignition system of aircraft engines. Their reliable operation is essential for the safe and efficient operation of the aircraft. By understanding the importance of spark plugs, performing regular maintenance, and selecting the right type for the engine, aircraft owners and operators can ensure that their aircraft's engine performs at its best.

Longer seal life can be expected with shafts having a Rockwell (RC) hardness of 30 or more. When exposed to abrasive contamination, the hardness should be increased to RC 60.
Seals are classified by O.D. wall material, lip type, and whether they have a spring or not.
Major oil seals are specified in ISO 6194-1 and JIS B 2402-1.
Table 2 shows the common types of oil seals, while Table 3 shows the features of each type of oil seal.
Table 4 lists the JTEKT oil seal type codes and corresponding ISO and JIS standards.
Industrial Oil Seals: Applications and Importance
Most oil seals consist of some basic elements that configure their structure, such as the sealing element, the metal case, and the spring:

Special exceptions still apply within the Volkswagen group. With PTFE oil seals, an aluminium or plastic housing is used in many different engine series. The Top Dead Centre (TDC) signal is no longer measured at the flywheel, but directly using a sensor on the rear crankshaft flange and integrated sensor in the oil seal. Special procedures and tools must be used for the disassembly and assembly of these parts.