518999 Flywheel thrust washer set, steel (0.060" thick)

These flywheel thrust washers are essential for maintaining the correct side play in your bottom end. Made from durable steel and measuring 0.060 inches thick, they are designed for use with steel retainers and fit between the connecting rods and the flywheels. This set is sold as a pair and is specifically for 1929 to 1973 45 inch Flathead models, including the WLA and Servi-Car. They are a direct replacement for OEM 23972-21 and 372-21. Precision is everything when rebuilding a Flathead motor, and these washers provide the exact tolerances needed for a reliable and long-lasting engine build.