The 86639034 is a genuine OEM hexagon head screw, manufactured by CNH Industrial for Fiatagri, New Holland, and Case IH agricultural and construction machinery. This essential fastening component ensures secure assembly in various applications, including engine components, transmissions, and chassis structures. Designed for durability and precise fit, it meets original equipment specifications for reliable performance across models like the New Holland T4000 and TL series, and Case IH JXT series.