The McCormick 6523568M91 is a genuine OEM fitting designed for various McCormick tractor series including X4.20, X4.30, X4.40, X4.50, X4.60, X5.35, X5.45, X5.55, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680 models. This essential component ensures proper connection within hydraulic or fluid systems. It is also compatible with a wide range of Landini and Valpadana tractors, offering broad application across agricultural machinery.