Honda Genuine OEM Rear Differential Drain / Fill Plug Washer - 94109-20000 - 20mm Factory replacement large size crush washers Fits all 4WD CR-V, Element, and Crosstour drain and fill plugs Fits Ridgeline and Pilot rear differential fill plugs, and transfer case drain and fill plugs Fits all Honda manual transmission fill plugs 20 millimeter crush washer