Description Fleetguard LF3644 is a spin-on cellulose engine lube oil filter with M20 x 1.5-6H internal threads, 86.5 mm overall length and 68.5 mm largest outside diameter, incorporating an internal bypass valve for reliable oil flow and commonly used on select Dodge, Eagle, Ford, Honda, Infiniti, Mazda, Mitsubishi, Nissan and Plymouth engines; cross-reference equivalents include Baldwin B1420, Caterpillar 1041426, Donaldson P502009, Hino 15607-2060 / S1560-72060 and Vetus STM0051.