The Donaldson P780036 is a high-quality spin-on fuel filter, designed to provide superior protection for Caterpillar fuel systems. This filter effectively removes contaminants from the fuel, preventing damage to sensitive engine components and ensuring efficient engine operation. With an outer diameter of 93.7 mm and a length of 175.3 mm, it features a 1-14 UN thread size and offers 99% efficiency at 10 micron. Engineered for durability and reliable performance, it is an essential component for maintaining fuel system integrity in compatible machinery. This filter is an equivalent to Caterpillar 6P7800 and Donaldson P550036.