The McCormick 3658895M91 is an OEM filling plug designed for use in a wide range of agricultural machinery. This essential component ensures proper sealing for various fluid reservoirs, preventing leaks and contamination. It is compatible with numerous McCormick tractor series, such as CX, MC, MTX, X60, X70, and XTX, as well as Massey Ferguson 3600, 4200, 4300, 5400, 6200, 6400, 7400, 8200, 8400, 8600 series, and select Challenger, Fendt, and Valtra models. Manufactured to OEM specifications for reliable performance and durability.