The Caterpillar 3261644 is a genuine Cat® standard efficiency spin-on fuel filter designed to effectively remove contaminants from fuel, protecting critical engine components. This primary fuel filter has an overall height of 176.4 mm and a largest outer diameter of 83.8 mm. It features a 13/16-16-2B thread size and a 72 mm seal outer diameter. Utilizing cellulose media, this filter does not include a bypass valve. It is essential for maintaining optimal fuel system performance and extending engine life in a wide range of Cat equipment.