truckparts leaf spring seat Product: heavy vehicle trunnion shaft seat. Materials: FCD45 Used in cargo vehicles/motor trucks/ cargo trucks/ lorries and so on. Accept Drawing or Sample! We produce any kind of the parts used in the heavy-duty loaded vehicles when the parts are made by casting. We have been audited ISO9001:2000 for all the castings. The castings can meet GB, ASTM, BS, JIS, DIN. All products will be produced according to the drawings or sample.