The McCormick 6639667A1 is a genuine OEM cerametallic clutch disc designed for heavy-duty applications in McCormick CX, MC, MTX, XTX, X7, and X8 series tractors. This drive disc ensures reliable power transmission and smooth engagement. It features an outer diameter of 310 mm, an inner diameter of 190 mm, and 14 splines, providing precise fitment and optimal performance in demanding agricultural environments. Also compatible with select Case IH MXM and New Holland TM series models.