The McCormick 6528428M1 Radiator Cap is a genuine OEM component designed to maintain proper cooling system pressure for various McCormick, Massey Ferguson, and Landini agricultural machinery. This essential cap ensures optimal engine temperature regulation, preventing coolant loss and system damage. It features an outer diameter of 60 mm, an inner diameter of 40 mm, and a height of 30 mm, ensuring a precise fit and reliable performance across compatible models.