The McCormick 4206604M1 is a genuine OEM fuel tank cap designed for various McCormick and Massey Ferguson tractor models, including the McCormick X4, X5, X6, and X7 series, and Massey Ferguson 5700, 6700, and 7700 series. This essential component ensures a secure and tight seal for the fuel tank, preventing fuel spillage and contamination. Manufactured to original equipment specifications, it guarantees reliable performance and a perfect fit. It is also cross-referenced as Massey Ferguson 3713000M1.