In this schematic the "Screw Pan Head" is used most often.
Parts such as the Electrical 2: Washer(6a1), O-ring (26h), Wire, Lead 2, Washer(526) are included in the Yfp350u 1988 Terrapro Electrical 2 parts fiche.
Of all the components that make up this Electrical 2 the Washer(6a1) has the lowest price.