The McCormick 6678912A1 is a genuine OEM brake disc designed for various McCormick tractor models, including the CX, F, T, V, X4, X5, X6, X7, and X8 Series. This essential component ensures reliable braking performance with an outer diameter of 190mm, an inner diameter of 100mm, and a thickness of 4mm. Weighing 0.8kg, it is a direct replacement and cross-references with OEM part number 87588710 used in Case IH and New Holland applications.