The McCormick 3691525M91 Filler Cap is a genuine OEM replacement part designed for various McCormick and Massey Ferguson agricultural tractors. This essential cap ensures proper sealing and containment of fluids, preventing leaks and contamination. With an outer diameter of 60 mm, a height of 51 mm, and a weight of 0.12 kg, this durable filler cap is built to OEM specifications for reliable performance and a perfect fit across a wide range of compatible models including McCormick X10, X20, X30, X40, X50, X60, X70 series, and Massey Ferguson MF1500, MF2600, MF3600, MF4700, MF5700, MF6700, MF7700, and MF8700 series tractors.