A direct OEM-spec replacement U-bolt for Lippert leaf spring axle assemblies. Built to fit 1-3/4" round axle tubes with a 3/8"-24 fine thread and zinc plating for long-term corrosion resistance -- whether you're doing a scheduled spring service or replacing hardware after a rough-road failure.
U-bolts are the critical fasteners that clamp the leaf spring pack to the axle tube. Using the wrong size -- even slightly off in inner width or thread pitch -- causes improper clamp load, accelerated spring wear, and potentially dangerous axle shift under load. The Lippert 139737 is sized specifically for the 1-3/4" axle tube diameter common on Lippert 2,200 lb trailer axle assemblies used across a wide range of travel trailers, fifth wheels, and utility trailers.
This is a single U-bolt. Most axle leaf spring applications require two U-bolts per spring perch (one per side of the spring plate). Verify your count before ordering.
3/8"-24 fine thread provides precise clamping torque and resists loosening from road vibration better than coarse-thread equivalents.
1-3/4" inner width matches Lippert's standard small-diameter axle tube used on 2,200 lb axle assemblies -- no shimming or adapting needed.
Zinc plating resists rust and road salt corrosion, extending service life and making future removal easier compared to bare steel hardware.
Sourced directly from Lippert, the largest RV chassis and suspension manufacturer in North America. Matches original hardware specifications exactly.
This U-bolt is designed for Lippert leaf spring axle systems with a 1-3/4" round axle tube and a 2,200 lb axle rating. This axle size is common on:
If your axle tube measures 2" or larger in outer diameter, this U-bolt will not fit -- measure your existing tube or check your axle tag before ordering.
U-bolt replacement is a straightforward job with basic hand tools, but proper torque is essential. Over-tightening distorts the spring plate; under-tightening allows axle walk.