Parts such as the Headlamp (ds185c): Rim,headlamp, Spacer (8.8x12x7), Washer, Lock Washer are included in the Ds185 1980 (t) Usa (e03) Headlamp (ds185c) parts fiche.
With two applications this Screw is the most specified part.
The component with the lowest price in the HEADLAMP (DS185C) schematic is the Spring,headlamp Unit.