The McCormick 979603M1 Radiator Cap is a genuine OEM replacement part designed for optimal cooling system performance. This cap maintains a pressure of 0.7 bar (10 PSI), ensuring proper coolant circulation and preventing overheating in compatible agricultural machinery. It is suitable for a wide range of McCormick, Massey Ferguson, and Landini tractor models, offering reliable fitment and durability. With an outer diameter of 60mm and a height of 25mm, this cap is engineered to precise specifications for a secure seal.