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Stainless Steel U Bolts: Durable & High Streghth

​U-bolts serve as vital parts on almost all trailers and heavy-duty vehicles. They ensure that your vehicles are aligned, stable, and can carry loads efficiently. These high-performance stainless steel U bolts are made from industrial-grade steel, forged to precision, and meet the manufacturer's suggested specifications.

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Our U-bolts fasteners are the best when it comes to withstanding corrosion,n whether the vehicle is being used for off-road racing, commercial transportation, or just as a standard passenger car.

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  • Created from carbon or alloy steel, which has been treated with heat

  • Zinc coating or powder coating that helps resist rust

  • Different sizes and types of threads are available

  • International standard certifications for compliance with quality and safety guidelines

Stainless Steel U Bolts Applications

Our stainless steel U bolts are tested under extreme torque and vibration conditions to ensure optimal long-term performance in the most demanding environments.

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U Bolts For Leaf Springs

On trailers, particularly types used for hauling equipment or cargo, U bolts  secure the axle’s position underneath the trailer bed. They:  

  • Enhance operational safety and stability during towing with regard to axle positioning.  

  • Accommodate repetitive changes in loads during the loading/unloading operations.  

  • Minimize lateral movement and reduce frame stress by maintaining the suspension in a tight and centered position.

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Agricultural and Construction Equipment

U bolts fasteners are important to construction machines, backhoes, and loaders, as well as for agricultural equipment such as tractors and combines, U bolts for leaf springs serve the purpose of stabilizing the heavy axles under severe twisting forces. In this case, U-bolts serve to:

  • Attach multi-leaf springs to high-load axles.

  • Withstand exposure to water, soil, particulates, or chemicals.

  • Permit the function of equipment mounted on shifting or unlevel ground without relative motion between the axles of the equipment and the mounting structure.

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Heavy Duty Trucks

The attachment of the leaf springs on the U-bolt mounted axle housing contains a suspension system, and U-bolt fasteners are critical components. In both light and heavy-duty trucks, they assist in:

  • Supporting multiple payloads without losing axle centering.

  • Dissipating shock from road surfaces and vibrations.

  • Restricting shunting of the leaf spring, during braking or sharp angular motion.

  • U bolts for leaf springs must endure great static tension and dynamic loads, especially for commercial logistics fleets that drive long distances every day.

Technical Specifications of Our Stainless Steel U Bolts 

Our stainless steel U bolts are designed to meet or exceed OEM standards and are available in a wide range of sizes, finishes, and material options to accommodate various vehicle and axle configurations. Whether you're sourcing for heavy-duty trucks, off-road vehicles, or industrial machinery, these are some specifications of U bolts made for leaf springs to ensure compatibility and performance.​

  • Material Options: Carbon steel, alloy steel, stainless steel

  • Thread Type: Fine thread / Coarse thread

  • Finish: Black oxide, Zinc-plated, Hot-dip galvanized

  • Diameter Range: 3/8" to 1-1/4"

  • Length Options: 3" to 14" (custom lengths available)

  • Shape: Round bend, Square bend, Semi-round

  • Grade: Grade 5, Grade 8, ASTM A325, etc.

  • Load Capacity: Up to 20,000 lbs (varies by size)

  • What is a U-bolt used for?
    U-bolts are used to support and secure pipes, tubes, or round objects to a surface. They’re commonly used in plumbing, automotive, construction, and mechanical applications.
  • What sizes of U-bolts do you offer?
    We offer U-bolts in a wide range of sizes, including: Diameter: 1/4" to 2" (or M6 to M48 metric) Length: Custom or standard lengths available Pipe Sizes: Compatible with various nominal pipe diameters (NPS) Custom sizes can be made to order—just provide your specs.
  • What materials are your U-bolts made from?
    We manufacture U-bolts from: Carbon steel Stainless steel (304, 316) Galvanized steel Alloy steel (on request) Coatings like zinc plating or hot-dip galvanizing are also available for corrosion resistance.
  • Can I order custom U-bolts?
    Yes, we offer custom U-bolts based on your dimensions, thread type, material, and finish requirements. Contact us with your drawings or specs for a quote.

Why Choose Us

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As a trusted manufacturer and supplier of stainless steel U bolts for over 50 years, we bring unmatched precision and quality to every product. All our U bolts are subjected to rigorous quality checks, including tensile strength testing, salt spray tests, and dimensional accuracy verification. We also offer custom U bolts for leaf springs to fit non-standard or modified axle setups

Benefits of choosing us:

  • Short lead times and bulk order discounts

  • OEM and aftermarket compatibility

  • Engineering support and CAD drawing services

  • Global shipping with secure packaging

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