This genuine McCormick 6674008A1 radiator cap is designed for optimal cooling system performance in a wide range of McCormick agricultural tractors. Featuring a precise opening pressure of 0.9 bar, an outer diameter of 58 mm, an inner diameter of 30 mm, and a height of 30 mm, it ensures proper pressure regulation and prevents coolant loss. It is a direct fit for McCormick C, CX, MC, MTX, T, X4, X5, X6, and X7 series models.