Some items from this specific schematic: Gasket Kit,b (nas), Washer,sealing,34, O-ring 32.95x2.62, O Ring,48.1x3.6.
Of all the components that make up this Gasket Kit B the Washer,plug,drain 12 has the lowest price.
With five applications this Washer,sealing,6. is the most specified part.