A sample from the products for the Gasket Kit B include: Washer Seal, 6mm, Washer,plug,drain 12, O-ring 9.5x1.5, Oring 183.
The sub assemblies and components that make up this Gasket Kit B include this Gasket Sheet Kit, (nas), the most expensive part.
In this schematic the "O-ring." is used most often.