The component with the lowest price in the E-7 RIGHT CRANKCASE COVER schematic is the Screw-washer,5x14.
A sample from the products for the E-7 Right Crankcase Cover include: Bolt,socket,6x32, Bolt,socket,6x22, Gasket,clch Cover (nas), Clamp,pulse Gen.
In this schematic the "Bolt,socket,6x22" is used most often.