The Washer, Screw 4x8 is the cheapest item from this partsfiche.
Parts such as the Radiator: O-ring 13.5x1.4, Brkt,rad Mt, Hose A, Clip B7,tube are included in the Cn250 Helix 1991 (m) Switzerland Kph Radiator parts fiche.
On this parts fiche the Clip B,hose. is the most specified component.