The Cat 3113901 Fuel Filter is a genuine Caterpillar standard efficiency primary fuel filter designed to protect your engine's fuel system components by effectively removing contaminants from the fuel. This essential filter ensures optimal engine performance and longevity across a wide range of Cat machinery. With an overall height of 185.9 mm and a largest outer diameter of 83.8 mm, it features a 1-14 UNS-2B thread size, making it a reliable component for engine fuel primary applications in numerous Caterpillar excavators, loaders, tractors, and other heavy-duty equipment.