The McCormick 86579705 is a genuine OEM fitting designed for use in various McCormick X4, X5, X6, X7, and X8 series tractors. This essential component ensures proper connection within the hydraulic or fluid systems, maintaining optimal performance and reliability for your agricultural machinery. Compatible models include X4.20, X4.30, X4.40, X4.50, X4.60, X5.35, X5.45, X5.55, X5.100, X5.110, X5.120, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X7.690, X8.660, X8.670, X8.680, X8.690, and X8.690 VT-DRIVE.