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