The Nut, Tappet Adjg is the cheapest item from this partsfiche.
Some items from this specific schematic: Arm Comp, Exh-a Rock, Screw Tappet Adjg, Nut, Tappet Adjg, Arm Comp, In-b Rocke.
This VALVE-ROCKER ARM (SOHC) assembly utilises thirty-two Cotter, Valve(s) - the highest specified component.