The McCormick T452041821 stop solenoid is a genuine OEM replacement part designed to control the engine shutdown mechanism in compatible McCormick tractor models. This essential component ensures proper and reliable engine stopping functionality, maintaining the operational integrity of your agricultural machinery. It is a direct fit for models such as the McCormick X4.30, X4.40, X4.50, X4.60, X4.70, X5.35, X5.45, X5.55, X5.100, X5.110, X5.120, 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.