The Fleetguard FS19974 is a high-performance spin-on fuel filter water separator designed for primary filtration in heavy-duty diesel engine applications. It effectively removes particulate contaminants and separates water from fuel, ensuring clean fuel delivery to the engine. Featuring a 20-micron efficiency rating (Beta 75) and 95% free and emulsified water separation, this filter protects critical fuel system components. It has an M16 X 1.5-6H thread size, 93.47 mm outer diameter, and 177.04 mm overall height. This genuine Fleetguard filter is a direct replacement for various OEM part numbers, including John Deere RE509031 and Case IH 87407510.