This genuine McCormick 3535078M91 fuel tank cap is designed to provide a secure and leak-free seal for the fuel tank on a wide range of Massey Ferguson tractors. Manufactured to OEM specifications, it ensures proper fuel system integrity and prevents contamination. It is compatible with numerous Massey Ferguson models including the 100, 200, 300, 500, and 600 series, such as MF 135, 165, 240, 265, 275, 290, 362, 375, 390, 565, 575, 590, 675, and 690.