The McCormick 3665146M1 is a genuine OEM radiator cap designed for various McCormick agricultural tractors. This essential component maintains the correct pressure within the cooling system, ensuring optimal engine temperature regulation and preventing coolant loss. With a pressure rating of 1.1 bar, it provides reliable performance for McCormick CX, MC, MTX, XTX, and ZTX series models, including CX105, MC115, MTX150, XTX215, and ZTX280.