This genuine McCormick 3686178M91 filler cap is an OEM component designed for a wide range of agricultural machinery across the AGCO group, including McCormick, Massey Ferguson, Valtra, Fendt, and Challenger models. Measuring approximately 95 mm in length, 51 mm in width, and 51 mm in height, and weighing about 0.05 kg, this filler cap ensures a secure seal for fluid reservoirs. It is a direct replacement for original equipment, guaranteeing proper fit and reliable performance in demanding agricultural applications.