This aftermarket replacement PTO Shaft End, part number 51856021 (also referenced as 5185602/1), is specifically designed for New Holland and Ford agricultural tractors. As a high-quality, non-OEM alternative, it provides a reliable and cost-effective solution for repairing or replacing worn-out or damaged PTO shaft components. This essential power take-off shaft end features a robust 6-spline TDD (Tractor Drive Disc) configuration, engineered to ensure secure and efficient power transfer from your tractor's drivetrain to various implements operating at a standard 540 rpm. Crafted to meet or exceed the performance standards of the original equipment, this aftermarket PTO shaft end offers exceptional durability and long-lasting reliability in demanding agricultural environments. Its precise engineering ensures a proper fit and seamless integration with compatible Ford tractor models, which often share part numbers with New Holland equipment. By facilitating the smooth and consistent operation of your PTO-driven machinery, this replacement part helps maintain productivity and minimize downtime. It's an ideal choice for farmers and technicians seeking a dependable, high-performance replacement without the OEM price tag, ensuring your equipment remains operational and efficient.