The 250-4-21-1 coupling shaft yoke belongs to the SPL250 series, engineered for robust performance in heavy-duty applications. It features a spline count of 46 and a spline diameter of 2.390 inches, ensuring a secure connection in demanding environments. The hub diameter measures 3.344 inches, while the through hole is 2.750 inches, allowing for easy installation. With a centerline to end measurement of 5.750 inches, this yoke is designed to accommodate various driveline configurations. Constructed in a high-strength (HR) style, it delivers the durability and reliability required for high-torque applications.