Product Introduction

This U-bolt is a heavy-duty fastening component specifically designed for the rear leaf spring suspension of heavy-duty trucks. It features a U-shaped, high-strength steel bolt with a silver hot-dip galvanized anti-corrosion coating, with precision-threaded ends for secure clamping. The robust construction ensures reliable performance under extreme loads and harsh operating conditions.

Performance

• Manufactured from high-grade alloy steel for exceptional tensile strength and resistance to shear forces, making it ideal for heavy-duty rear suspension applications.

• The hot-dip galvanized coating provides superior long-term protection against rust, road salt, and environmental corrosion, extending the component’s service life.

• Precision-engineered threads ensure a secure, uniform clamping force when paired with nuts, preventing loosening under constant vibration and dynamic stress.

• Operates reliably in temperatures ranging from -40°C to 120°C, suitable for all heavy-duty operating conditions.

Core Function

1. Serves as a critical fastening component in the rear leaf spring suspension system, securely clamping the leaf springs to the axle housing.

2. Transmits and distributes suspension loads evenly across the rear axle, maintaining proper axle alignment and vehicle stability.

3. Withstands extreme loads generated by heavy payloads, off-road conditions, and dynamic suspension movement.

4. Contributes to overall vehicle safety and reliability by preventing component separation and maintaining the integrity of the rear suspension system.

U-Bolt For Rear Leaf Spring WG9125520268 – Genuine Sinotruk Heavy-Duty Fastener

When it comes to securing the rear leaf spring assembly on heavy-duty trucks, there’s no room for compromise. The U-Bolt For Rear Leaf Spring WG9125520268 is a precision-engineered fastening component built exclusively for Sinotruk heavy-duty platforms. Manufactured from high-strength steel with a hot-dip galvanized anti-corrosion coating, this U-bolt delivers unwavering clamping force — even under the most punishing loads and road conditions. Whether you’re stocking inventory for fleet maintenance or supplying aftermarket distributors, this part offers the reliability and margin your business demands.

As a trusted global supplier of Chinese brand truck parts, Mettlead brings you this genuine-spec component at competitive factory-direct pricing. Explore our full range of Sinotruk HOWO Truck Parts or browse all Chassis Components to complete your order.

Key Features and Benefits of U-Bolt WG9125520268

Every detail of this rear leaf spring U-bolt is designed to perform under extreme stress. Here’s why distributors and fleet operators trust this part:

• High-Strength Steel Construction: Forged from premium carbon steel, this U-bolt resists bending, fatigue, and deformation — even when subjected to continuous heavy payloads.
• Hot-Dip Galvanized Finish: The silver zinc coating provides superior corrosion resistance, significantly extending service life in humid, salty, or dusty environments.
• Precision-Rolled Threads: Both threaded ends feature rolled (not cut) threads, which increases tensile strength and ensures consistent, secure nut engagement every time.
• Exact OEM Dimensional Fit: Manufactured to match the original WG9125520268 specifications, guaranteeing a drop-in replacement with no modifications required.
• Uniform Clamping Pressure: The symmetrical U-shape distributes load evenly across the leaf spring pack, preventing uneven wear and maintaining proper axle alignment.
• Cost-Effective Wholesale Pricing: Factory-direct sourcing from China eliminates middlemen, giving you healthier profit margins on every unit sold.

In other words, this isn’t just a bolt — it’s a critical safety component that keeps the rear suspension firmly anchored to the axle. Consequently, choosing a substandard alternative can lead to spring pack loosening, axle misalignment, and costly downtime.

Technical Specifications – U-Bolt WG9125520268 Sinotruk

Below you’ll find the detailed parameters for this rear leaf spring U-bolt. These specifications reflect the OEM standard dimensions and material properties:

Note: Dimensions (inner width, leg length, thread diameter) correspond precisely to the OEM drawing for WG9125520268. If you need exact measurements for cross-referencing, please contact us with your requirements.

Application Scenarios – Where Does This U-Bolt Fit?

This U-bolt is specifically engineered for the rear suspension systems of Sinotruk heavy-duty truck platforms. More specifically, it serves three primary use cases:

1. Compatible Vehicle Models

• Sinotruk HOWO (A7, 371HP, 375HP, 420HP series)
• Sinotruk T7H heavy-duty tractor and cargo trucks
• SITRAK (Steer, Drive axle configurations)
• Sinotruk HOWO T5G medium-heavy platforms

2. Functional Application

The U-bolt’s primary role is to clamp the rear leaf spring pack firmly to the rear axle housing. It passes over the axle tube, wraps around the spring seat, and secures with nuts and a bottom plate — forming the critical connection between the suspension and the drivetrain.

3. Service Scenarios

• New Vehicle Assembly: OEM-line installation on newly manufactured Sinotruk trucks.
• Damage Replacement: Replacing cracked, stretched, or corroded U-bolts that have lost clamping integrity.
• Chassis Overhaul & Maintenance: Routine suspension rebuilds during scheduled fleet maintenance intervals.

Because U-bolts are classified as wear-and-tear items on heavy trucks, fleet operators typically replace them in sets during major service intervals. This creates consistent, recurring demand — making it an ideal SKU for wholesale distributors. Discover more Sinotruk Truck Parts to expand your product catalog.

OEM/ODM Capability – Custom Packaging & White-Label Solutions

At Mettlead, we understand that distributors need more than just parts — they need a supply partner who supports their brand. That’s why we offer flexible OEM and ODM services for the WG9125520268 U-bolt and our entire product range:

• White-Label Packaging: We can ship with your brand name, logo, and part number on the packaging — helping you build brand equity in your local market.
• Custom Packaging Design: From individual poly bags to branded carton boxes with barcodes, we accommodate your packaging specifications.
• Strict Quality Control: Every batch undergoes dimensional inspection, hardness testing, and coating thickness verification before shipment.
• Flexible MOQ: We work with both small trial orders and large container-load shipments, so you can test the market before committing to volume.
• Factory Visits Welcome: We invite serious buyers to visit our facilities in China for on-site quality audits and face-to-face discussions.

Furthermore, our team provides technical support to help you cross-reference part numbers and confirm fitment — reducing returns and boosting customer satisfaction on your end.

Frequently Asked Questions – U-Bolt WG9125520268

What is the exact function of U-Bolt WG9125520268 on a Sinotruk truck?

This U-bolt secures the rear leaf spring pack to the rear axle housing. It wraps around the axle tube and clamps down through a spring seat plate, holding the entire rear suspension assembly in proper alignment. Without adequate clamping force, the axle can shift — leading to dangerous handling instability.

Is this U-bolt compatible with both HOWO and SITRAK models?

Yes. The WG9125520268 is a cross-platform part used across multiple Sinotruk heavy-duty series, including HOWO, T7H, and SITRAK models equipped with rear leaf spring suspension. However, we always recommend confirming your specific chassis configuration before ordering in bulk.

What material is the U-Bolt WG9125520268 made from, and why does it matter?

It’s manufactured from 45# high-strength carbon steel, then heat-treated to achieve a hardness of HRC 28–35. This combination provides excellent fatigue resistance and prevents the bolt from stretching or snapping under heavy loads. The hot-dip galvanized coating adds a further layer of protection against road salt, moisture, and chemical exposure.

How often should rear leaf spring U-bolts be replaced?

As a general guideline, U-bolts should be inspected every 50,000–80,000 km and replaced if any signs of elongation, thread damage, or corrosion are present. Many fleet operators replace them preventively during major suspension overhauls to avoid unexpected failures on the road.

Can I order this U-bolt with my own brand packaging?

Absolutely. Mettlead offers full white-label and custom packaging services. You can supply your artwork, and we’ll produce packaging that matches your brand identity — complete with your logo, part numbers, and barcodes.

What is the minimum order quantity for wholesale pricing?

MOQ varies depending on whether you need standard or custom-packaged units. For specific pricing tiers and volume discounts, please contact us directly with your estimated quantity.

How do I verify that WG9125520268 fits my customer’s truck?

The most reliable method is to match the OEM part number stamped on the original U-bolt or listed in the vehicle’s parts catalog. If you’re unsure, send us the truck’s VIN or chassis number, and our technical team will confirm compatibility for you.

Ready to Stock U-Bolt WG9125520268? Let’s Talk.

You’ve seen the specs. You understand the quality. Now it’s time to secure your supply. Whether you need a trial order to test market demand or a full container load for your warehouse, Mettlead is ready to deliver — with factory-direct pricing, fast lead times, and reliable logistics to your door.

Here’s what to do next:

1. Send your inquiry — Include your target quantity, packaging preference, and destination country.
2. Receive your quote — We’ll respond within 24 hours with competitive pricing and shipping options.
3. Confirm and ship — Once approved, production and delivery move fast.

👉 Contact Us Now to request your wholesale quote for U-Bolt WG9125520268 Sinotruk. Our team is standing by to support your business growth.

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