Steering U-Joint Pin & B lock 1inOD 1/2 Smooth Bo

The BORGESON Steering U-Joint Pin and Block assembly (Part Number 515959) is a single-joint steering universal joint designed for applications requiring a 1-inch outer diameter with 1/2-inch smooth bores on both ends. This component transfers rotational motion between steering column shafts that are not perfectly aligned, allowing smooth directional control while accommodating minor angular misalignment common in street rods, race cars, and custom steering systems.

Constructed from steel in natural (uncoated) finish, this steering universal joint features the pin-and-block design—a proven architecture where hardened needle rollers housed in the yoke block absorb rotational loads while the cross pin provides the articulation point. The 1/2-inch smooth shaft bores accommodate slip-fit installation with setscrews or clamps, offering flexibility in mounting configurations. At 0.49 lbs, the compact weight and 3.7 x 1.4 x 5.3-inch envelope make it suitable for tight engine bay layouts without adding significant rotating mass to the steering system.

This u-joint is sized for mid-size steering shafts found in classic car restorations, hot rods, custom trucks, and race vehicles where OEM steering geometry has been modified or where custom steering columns are fabricated. The smooth 1/2-inch bore diameter is standard across many aftermarket steering components, ensuring broad compatibility with custom-built and retrofit steering packages. Natural steel finish requires regular lubrication and protection from corrosion to maintain smooth operation.

BORGESON is recognized in the automotive restoration and performance community for precision steering components engineered to exacting tolerances. This steering u-joint assembly delivers the mechanical accuracy and durability expected from a specialist supplier focused on steering system reliability and precision fitment in custom and modified vehicles.