In this schematic the "Bolt" is used most often.
Of all the components that make up this Secondary Drive Gear (model K8/k9) the O Ring(d:1.7,id:6) has the lowest price.
A sample from the products for the Secondary Drive Gear (model K8/k9) include: O Ring(d:1.7,id:6), Shim Set,sec Drive, Housing,oil Seal, Stopper Secondary Set,driven.