Steering U-Joint 1inDD x 3/4in-30

The BORGESON Steering U-Joint 1in DD x 3/4in-30 (SKU BRG015231) is a single steering universal joint engineered to connect steering columns with 1-inch double-D input shafts to 3/4-inch 30-spline output shafts. This steel construction joint accommodates misalignment between steering components while transmitting rotational force with minimal play, making it essential for custom steering systems, hot rods, off-road vehicles, and performance vehicles that require reliable column-to-box or column-to-rack connections.

The dual-diameter design—1-inch double-D on one end and 3/4-inch 30-spline on the other—provides maximum contact and load distribution while allowing angular correction of up to several degrees. Steel construction delivers the strength required for steering loads without deflection, even under aggressive driving or off-road conditions. The natural finish resists corrosion in typical automotive environments, though protection or finishing may be applied based on installation location and exposure. This universal joint is designed as a single-joint solution, ideal for applications where steering column and steering box input shafts are relatively aligned but require vibration isolation and angular accommodation.

Steering U-joints of this specification are commonly used in street rods, restomod vehicles, and custom off-road rigs where original steering geometry has been modified or upgraded. Builders who are upgrading to a modern steering box or electric-assist rack often require an intermediate universal joint to bridge non-standard column terminations to new steering components. The BORGESON 015231 accommodates 1-inch DD columns paired with 3/4-inch 30-spline steering boxes or similar components, making it a direct solution for these custom installations.

BORGESON has established itself as a trusted supplier of steering and suspension components to the custom automotive and restoration markets. Their universal joints are designed to OEM standards for load capacity and angular range, ensuring safe steering response and long service life. Proper installation with appropriate fasteners and alignment is critical; confirm that spline counts and shaft diameters match your specific steering column and box before ordering.