The McCormick 6637633A1 is a genuine OEM collar designed for various McCormick and Landini tractor models. This essential component ensures secure fastening and proper operation within the machinery. It is compatible with McCormick X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X7.690, X8.660, X8.670, X8.680 series tractors, as well as Landini 6-120C, 6-130C, 6-140C, 7-140, 7-160, 7-175, 7-180, 7-200, 7-210, 7-230, 7-240, 7-260, 7-290, 8-270, 8-290, and 8-310 models. Manufactured to original equipment specifications, this collar guarantees durability and precise fitment, maintaining the integrity of your agricultural equipment.