The McCormick 3660455M91 is a genuine OEM hydraulic fitting designed for critical fluid connections within agricultural machinery. This essential component ensures secure and leak-free operation of hydraulic systems in various tractor and combine harvester models. Verified fitment includes a wide range of Massey Ferguson 100, 200, 300, 500, 600, 800, and 8200 series tractors. Manufactured to original equipment specifications, this fitting provides durability and precise fitment for maintaining optimal hydraulic performance in demanding agricultural applications.