The McCormick 6511105M1 is an authentic OEM spring designed for use in a range of McCormick agricultural equipment. This genuine replacement part ensures proper function and durability, maintaining the original specifications of your machinery. It is compatible with models such as the McCormick X4.30, X4.40, X4.50, X4.60, X5.35, X5.45, X5.55, X6.440, X6.460, X6.470, X6.480, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680.