In this schematic the "Bolt,flange,6x45" is used most often.
Of all the components that make up this Crankcase/oil Pump the Nut,hex 6mm has the lowest price.
A sample from the products for the Crankcase/oil Pump include: Oil Seal,24x40x7, Bolt,flange Sh 6x65, Tube,oil Pass, B/brg Rad N/com.