In this schematic the "Bolt,flange,6x55" is used most often.
Parts such as the Oil Pan: Cover,oil Pan, Bolt,flange,6x55, Washer,plug Drain 14, Bolt,flange,6x32 are included in the Cx500t Turbo 1982 (c) European Direct Sales Oil Pan parts fiche.
Of all the components that make up this Oil Pan the Washer,plug Drain 14 has the lowest price.