Product Introduction

Structure

This leaf spring pin is a precision-machined alloy steel assembly designed for heavy-duty truck leaf spring suspension systems. It consists of a smooth cylindrical shank with a flanged head at one end, a threaded section at the other, a flat washer, and a hexagonal nut for secure clamping. The entire component is finished with a zinc-plated passivation coating, which imparts a metallic, iridescent appearance and provides excellent corrosion resistance. The design is optimized for high-strength, fatigue-resistant performance in leaf spring pivot applications.

Performance

Manufactured from high-grade alloy steel (e.g., 42CrMo) and subjected to controlled heat treatment, this pin achieves a tensile strength grade of 12.9, exhibiting exceptional fatigue resistance and yield strength. It is designed to withstand the extreme dynamic loads, impacts, and torsional forces encountered in heavy-duty operation, maintaining structural integrity in temperatures ranging from -40°C to 120°C. The zinc-plated passivation coating provides superior protection against rust, salt spray, and chemical exposure, ensuring long-term durability in diverse operating environments. The precision-machined threads ensure a tight, secure fit, minimizing play and ensuring consistent performance.

Core Function

1. Serves as a critical pivot component in leaf spring suspension systems, allowing controlled articulation of the spring while maintaining proper alignment.

2. Transmits and distributes complex loads such as vertical pressure, lateral torque, and longitudinal impact from the leaf spring to the chassis, maintaining the integrity of the suspension system.

3. Maintains precise alignment of the leaf spring, preventing relative displacement under dynamic conditions such as vehicle acceleration, braking, and turning, avoiding abnormal wear of suspension parts.

Leaf Spring Pin WG80680029 Sinotruk – OEM-Quality Chassis Component for Heavy-Duty Trucks

When your heavy-duty truck hits the road under extreme loads, every single suspension component matters. The Leaf Spring Pin WG80680029 is a critical fastener that holds your leaf spring assembly firmly in place, ensuring smooth articulation and reliable shock absorption across thousands of kilometers. Designed specifically for Sinotruk HOWO heavy-duty vehicles, this pin delivers the precision fit and lasting durability that fleet managers and workshop professionals demand.

At Mettlead, we supply this genuine-specification leaf spring pin directly from our quality-controlled manufacturing base in China. As a result, you get factory-direct pricing without compromising on the dimensional accuracy or material strength your trucks depend on. Whether you are maintaining a single vehicle or managing a large fleet, this component keeps your suspension system performing at its best.

Key Features and Benefits of Leaf Spring Pin WG80680029

Choosing the right leaf spring pin is not just about finding the correct part number. It is about securing your entire suspension system’s integrity. Here is what makes this component stand out:

• Precise OEM Specification: Manufactured to match the exact dimensions and tolerances of the original Sinotruk WG80680029 part number, so installation is seamless and hassle-free.
• High-Strength Material: Crafted from hardened alloy steel, this pin resists shearing forces, fatigue cracking, and premature wear—even under continuous heavy loads.
• Corrosion-Resistant Surface: A protective surface treatment guards against rust and oxidation, extending service life in humid, dusty, or salt-exposed environments.
• Smooth Articulation: The precision-ground finish ensures the leaf spring pivots freely, reducing friction and preventing binding during suspension travel.
• Reduced Downtime: A direct-fit replacement means your mechanics spend less time in the workshop and more time keeping your fleet on the road.
• Cost-Effective Maintenance: Factory-direct sourcing from Mettlead eliminates middlemen, giving you competitive bulk pricing without sacrificing quality.

Application Scenarios

The Leaf Spring Pin WG80680029 is engineered for demanding real-world conditions. More specifically, it serves the following critical functions within your truck’s chassis system:

• Compatible Vehicles: Fits Sinotruk HOWO series heavy-duty trucks and selected SITRAK models that share the same suspension architecture.
• Leaf Spring Fixation: Secures the leaf spring pack to the frame bracket or shackle, preventing lateral and longitudinal movement of the spring assembly.
• Articulated Shock Absorption: Acts as the pivot point that allows the leaf spring to flex and absorb road impacts, protecting the chassis and cargo from excessive vibration.
• Heavy-Load Transport: Ideal for long-haul logistics, mining trucks, construction haulers, and any application where consistent suspension performance under extreme weight is non-negotiable.

In short, wherever your Sinotruk operates—whether on highways, construction sites, or unpaved mining roads—this leaf spring pin quietly does its job so the rest of your suspension system can do its job, too.

Technical Specifications

Accurate specifications help you verify fitment before placing your order. Below you will find the key parameters for this leaf spring pin:

If you need additional dimensional data such as pin diameter, total length, or tolerance ranges, please do not hesitate to contact us with your requirements.

OEM/ODM Capability

Mettlead understands that different markets have different needs. That is why we offer flexible manufacturing and branding solutions for the Leaf Spring Pin WG80680029 and our entire catalog of Sinotruk parts:

• White-Label Packaging: We can ship products in neutral packaging, ready for you to apply your own brand identity and resell in your local market.
• Custom Packaging: Want your logo, part number, and branding on every box? We handle the design and printing so each delivery reinforces your brand.
• Strict Quality Control: Every batch undergoes dimensional inspection, hardness testing, and surface quality checks before it leaves our facility. Consequently, you receive parts that consistently meet specifications.
• Flexible Order Quantities: Whether you need a trial order of a few dozen pins or a container-load for large-scale distribution, we accommodate your volume with competitive pricing tiers.
• Factory Visits Welcome: We encourage prospective partners to visit our production base in China. Seeing our processes firsthand builds the trust that long-term business relationships require.

Explore our full range of Sinotruk HOWO truck parts or browse by system in our chassis parts category to find related suspension components.

Frequently Asked Questions (FAQ)

What is the function of Leaf Spring Pin WG80680029 in a Sinotruk truck?

The leaf spring pin serves as the pivot point connecting the leaf spring assembly to the vehicle’s frame bracket or shackle. It allows the spring to articulate under load while keeping it securely fixed in position. Without a properly functioning pin, the leaf spring cannot absorb road shocks effectively, which leads to accelerated wear on other suspension and chassis components.

How do I know if my leaf spring pin needs replacement?

Common signs include excessive play or knocking sounds from the suspension area, uneven tire wear, or visible wear and scoring on the existing pin. Additionally, if the leaf spring appears to shift laterally during driving, the pin or its bushing has likely worn beyond service limits. Regular inspection during scheduled maintenance helps you catch these issues before they escalate.

Is this leaf spring pin a direct fit for my Sinotruk HOWO truck?

Yes. The WG80680029 leaf spring pin is manufactured to OEM dimensions and specifications for Sinotruk HOWO heavy-duty trucks. It installs directly without modification. However, if you are unsure about compatibility with a specific model year or variant, simply share your VIN or chassis number with our team and we will confirm fitment for you.

What material is the Leaf Spring Pin WG80680029 made from?

This pin is made from hardened alloy steel, which provides excellent resistance to shear stress, bending fatigue, and surface wear. The anti-corrosion coating further protects the pin from environmental degradation, making it suitable for operations in harsh climates.

Can I order this leaf spring pin in bulk for my parts distribution business?

Absolutely. Mettlead specializes in B2B supply with flexible MOQs. We offer volume-based pricing, white-label packaging, and reliable global shipping. For bulk pricing and lead times, please contact us directly.

How long does this leaf spring pin typically last?

Service life depends on operating conditions, load frequency, and maintenance practices. Under normal highway use with regular lubrication, you can expect the pin to perform reliably for the same interval as OEM parts. In severe-duty applications like mining or off-road hauling, more frequent inspection intervals are recommended.

Ready to Secure Your Supply of Leaf Spring Pin WG80680029?

Your trucks cannot afford suspension failures, and your business cannot afford inflated parts costs. Mettlead bridges that gap by delivering OEM-quality Leaf Spring Pin WG80680029 Sinotruk components at factory-direct prices, with the reliable delivery and professional service your procurement team expects.

Take the next step today:

• Request a competitive quotation with volume pricing
• Ask about custom packaging or white-label options
• Confirm fitment for your specific fleet models

👉 Contact Us Now to get your personalized quote and lead time. Our team typically responds within 24 hours.

You can also explore our comprehensive Sinotruk truck parts catalog to find additional components for your fleet maintenance needs.