The McCormick 3134217R1 is a genuine OEM radiator cap designed for various McCormick C, CX, MC, MTX, T, V, X4, X50, X60, X7, X70, and XTX series tractors. This essential component maintains the correct pressure within the cooling system, operating at 0.9 bar (13 PSI) to prevent coolant boil-over and ensure efficient engine cooling. With an outer diameter of 57mm, an inner diameter of 30mm, and a height of 27mm, it provides a precise fit for optimal performance and longevity in agricultural machinery.