- The RC7YC spark plug is designed to ignite the compressed fuel and air mixture in the combustion chamber, creating a controlled explosion that drives the pistons and ultimately powers the vehicle. This process relies on a precise timing and spark intensity, which is why it's important to choose the right spark plug for your engine.

J: Additional code is added here as an identifier when two or more seals have exactly the same type codes and dimensional numbers.
Sometimes, two different kinds of fluids leak from one chamber to another and gets mixed up. Here, this type comes as a boon. This is a metal inserted duplex type oil seal recommended on such assembly where mix-up of two different fluids is to be prevented.


Failure Modes of Oil Seals
Type (type code)

0.4 to 1.6 μmRa,
1.6 to 6.3 μmRz
2. For rubber O.D. wall type:
1.6 to 3.2 μmRa,
6.3 to 12.5 μmRz
(Firmly affixes the oil seal and prevents leakage through the seal O.D.)
Because of the higher temperature resistance of FKM, this material is also chosen for applications where higher speeds play a role, which raise the temperature at the sealing lip considerably. Usually, using FKM will result in a longer life than using NBR. This compensates the higher price of FKM compared to NBR, as an FKM does not have to be replaced as frequently. The low temperature resistance of standard FKM is limited to -15 ˚C.