This genuine McCormick 3657819M91 shaft is an original equipment manufacturer (OEM) part designed for various McCormick X4, X5, and X6 series tractors. It also serves as an OEM equivalent for Landini 3657819M91 and Arbos 3657819M91, fitting a wide range of Landini 4-series, 5-series, 6-series, and Arbos 3000, 4000, 5000 series models. Key technical specifications include a length of 215 mm, an outer diameter of 40 mm, and 13 splines, with a weight of 1.10 kg, ensuring precise fit and reliable performance.