The McCormick 3653890M1 is an OEM radiator cap designed for various McCormick, Landini, and Massey Ferguson agricultural tractors. This essential component maintains the correct pressure within the cooling system, preventing coolant loss and ensuring efficient engine temperature regulation. With a diameter of 60mm, a height of 30mm, and a pressure rating of 0.9 bar, this cap provides a secure fit and reliable operation for compatible models.