Steering U-Joint 3/4in x 3/4in Smooth

The Flaming River Steering U-Joint 3/4in x 3/4in Smooth (FR1700) is a single-joint universal coupling designed to connect steering shafts with smooth 3/4-inch diameter bores at each end. This nickel-plated steel joint accommodates angular misalignment between steering column segments while transmitting rotational input from the steering wheel to the rack-and-pinion or recirculating-ball gearbox. The smooth bore design eliminates the need for keyways or set-screws, simplifying installation while maintaining a clean, corrosion-resistant appearance.

Flaming River u-joints are engineered for street rod and custom automotive applications where OEM steering shafts require modification or splicing. The nickel-plated finish provides corrosion protection in salt-air and high-humidity environments, critical for vehicles stored outdoors or driven in coastal regions. The universal joint design permits up to approximately 30 degrees of total deflection between input and output shafts—sufficient for angled shaft runs common in custom chassis layouts. The 3/4-inch diameter specification matches many aftermarket and modified steering columns, making this component a standard reference part for steering system rebuilds and custom fabrication.

Buyers typically specify this u-joint when replacing worn or damaged steering couplings, fabricating custom steering shafts for hot rods and restorations, or connecting aftermarket steering boxes to modified or relocated columns. Each joint is sold as a single unit and weighs 0.83 pounds, making it suitable for motorsport applications where weight tracking matters. The smooth bore compatibility requires precise shaft diameters; verify your steering shaft OD measures exactly 3/4 inch before purchase to ensure proper fit and rotational freedom without binding.