Description Fleetguard FF5319 is a spin-on primary fuel filter for heavy-duty applications using Caterpillar engines and trucks from Ford, Freightliner, International, Kenworth, Peterbilt, Sterling and Western Star. It uses high-efficiency 5 micron media with 1-14 UNS-2B threads, approximately 240.5 mm overall height and 93.5 mm outside diameter with an attached gasket to protect fuel injection components. The FF5319 typically replaces Caterpillar 1R0749 and equivalent filters such as Baldwin BF7587, Donaldson P551311 and Wix 33674, and is specified for Caterpillar 3406, 3176, C10, C11, C12, C13, C15 and C16 engines in a wide range of on-highway trucks and off-highway machinery.