10.5X18X2.0. 10.5X18X2.0. 10.5X18X2.0. 10.5X18X2.0. A Flat Disc with a Hole in the that is placed Under or between the Starter Motor or related components to even Pressure as they are tightened. C0 U6. EJ25#.AT:1PCS. Engine Crankshaft Main Bearing Cap Washer. EZ30D:2PCS. U5.