The Fleetguard FF261 is a spin-on fuel filter primarily used on Perkins 1104D-E44TA and Caterpillar C4.4 industrial diesel engines, replacing Perkins 2656F843 and 2656F541 along with Caterpillar 2998229. Internal metric thread, outside-in flow, 5.51" overall length × 3.06" OD. Built by Fleetguard (Cummins Filtration). Specifications Manufacturer Fleetguard (Cummins Filtration) Part Number FF261 Part Type Fuel Filter (Spin-On) Thread Form Metric, Internal, 6H class Thread Diameter 0.47 in Thread Pitch 0.06 in Thread Seal Internal Largest OD 3.06 in Overall Length 5.51 in Gasket OD 2.81 in Gasket ID 2.47 in Flow Direction Outside In Hydrostatic Burst (Min) 200 PSI Anti-Drain-Back Valve No Cross References This filter replaces or is equivalent to the following part numbers: Perkins: 2656F843, 2656F541 Caterpillar: 2998229 AGCO: 515517D1, 525517D1 Claas: 5300560 FG Wilson: 1000012854, 1000059646 Hydrema: 7003810 Manitou: 747351 Tamrock: 55083553 Vogele: 2050086, 2081071 Extec: EN1015 Lekang: 53075 Applications This fuel filter fits the following engines and equipment: Perkins 1104D-E44TA 4.4L (industrial diesel) Caterpillar C4.4 (industrial / off-highway diesel) FG Wilson generator sets using the above engines AGCO, Claas, Manitou, Hydrema, Tamrock, and Vogele equipment specifying these cross-reference numbers Verify your existing filter dimensions, thread, and OE part number before ordering.