The Rail End Cap is an OEM part for Frigidaire dishwashers. This small but essential component is designed to fit at the end of the dishwasher rack rails, preventing the racks from sliding off the rails when pulled out for loading or unloading. The end caps also help to protect the dishwasher’s interior walls from scratches or damage that might occur if the metal racks were to come into direct contact with them.  Symptoms of a failing rail end cap include: Dishwasher racks sliding off the rails Difficulty pulling racks in and out smoothly Noticeable damage or scratches inside the dishwasher Causes of rail end cap damage typically involve physical stress from frequent use, accidental breakage during loading, or degradation of the material over time. This OEM replacement is also compatible with Electrolux, Gibson, Kelvinator, and Kenmore models.Part Number 5304506510 (AP6036334) replaces 5304440996, 4456332, PS11770481.