The lowest price component in this Meter - A/se parts-list fiche is the Screw-washer,3x12.
Some items from this specific schematic: Screw Wash 3x22, Screw,tapping,3x10, Clamp, Screw,flange,4x12.
With a quantity of ten pieces, the Screw 4x16 is the most used part in the METER - A/SE diagram.