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 long, smooth cylindrical shank, a threaded section, 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 99100520710 Sinotruk – Premium Quality Replacement Part

When your heavy-duty Sinotruk truck demands a reliable suspension connection, the Leaf Spring Pin 99100520710 delivers exactly what you need. This precision-engineered pin serves as the critical pivot point that secures your leaf spring assembly to the chassis, ensuring smooth articulation and load-bearing stability under the toughest operating conditions. Sourced directly from our factory, this genuine-spec component keeps your fleet rolling without costly downtime.

At Mettlead, we understand that every hour your truck sits idle costs money. That’s why we supply this Sinotruk leaf spring pin with factory-direct pricing, strict quality control, and fast global delivery — so you can get back on the road with confidence.

Key Features and Benefits of Leaf Spring Pin 99100520710

This Sinotruk leaf spring pin isn’t just a simple fastener — it’s a load-critical component that directly affects ride quality, steering alignment, and overall chassis integrity. Here’s what makes our offering stand out:

• Exact OEM Specification: Manufactured to match the original Sinotruk part number 99100520710, ensuring a perfect fit without modifications.
• High-Strength Alloy Steel: Forged from premium-grade steel with appropriate heat treatment, this pin resists shear forces, fatigue cracking, and corrosion even under extreme payloads.
• Precision Surface Finish: Ground to tight tolerances for smooth rotation within the spring eye bushing, reducing friction wear and extending service life.
• Heavy-Duty Load Capacity: Engineered to handle the demanding weight distribution of fully loaded Sinotruk heavy trucks without deformation.
• Factory-Direct Pricing: By sourcing directly from our manufacturing facility in China, you eliminate middlemen and enjoy competitive bulk pricing.
• Strict Quality Control: Every batch undergoes dimensional inspection, hardness testing, and surface quality checks before shipment.

In other words, when you choose this leaf spring pin, you’re investing in a component that protects your entire suspension system from premature wear and unexpected failure.

Application and Vehicle Fitment

The Leaf Spring Pin 99100520710 is specifically designed for Sinotruk heavy-duty vehicles. It functions as the articulating pivot that secures the leaf spring assembly to the chassis bracket, allowing controlled movement as the suspension cycles through compression and rebound.

Compatible Vehicles

• SINOTRUK HOWO series heavy trucks
• SINOTRUK SITRAK series vehicles
• Other Sinotruk models utilizing part number 99100520710

Functional Role

• Leaf Spring Pivot Connection: Acts as the hinge pin at the front or rear eye of the leaf spring pack, enabling the spring to articulate freely under load.
• Chassis-to-Spring Linkage: Securely connects the leaf spring assembly to the frame-mounted bracket, maintaining proper suspension geometry.
• Load Transfer Point: Transmits vertical and longitudinal forces between the axle assembly and the vehicle frame during acceleration, braking, and cornering.

Whether your trucks operate on highways, construction sites, or mining roads, this leaf spring pin maintains structural integrity across all terrain types. For more Sinotruk suspension and chassis components, explore our Chassis Parts Category page.

Technical Specifications

Below you’ll find the detailed parameters for the Leaf Spring Pin 99100520710 Sinotruk. These specifications ensure you can verify fitment and compatibility before placing your order.

Note: If you require exact dimensional data (diameter, length, tolerance class), please contact our team with your vehicle model and we’ll provide a detailed technical drawing.

OEM/ODM Capability and Custom Packaging

We recognize that different markets have different requirements. That’s precisely why Mettlead offers flexible OEM and ODM services for the Leaf Spring Pin 99100520710 and our entire range of Sinotruk parts.

What We Offer

• White-Label Packaging: Receive products in neutral packaging, ready for your own branding and distribution channels.
• Custom Packaging Design: We can print your logo, part numbers, and brand identity directly on the packaging — ideal for distributors building their own aftermarket brand.
• Bulk Order Flexibility: Whether you need 100 pieces or 10,000, our production capacity scales to meet your demand without sacrificing quality or lead time.
• Quality Documentation: We provide inspection reports, material certificates, and dimensional verification records upon request.

Moreover, our factory welcomes on-site visits. If you’d like to inspect our production lines, quality control processes, and warehousing facilities firsthand, we’re happy to arrange a tour. This transparency reflects our commitment to building long-term partnerships with distributors and fleet operators worldwide.

Browse our full range of Sinotruk HOWO Truck Parts to discover additional components for your inventory.

Frequently Asked Questions About Leaf Spring Pin 99100520710

What exactly does a leaf spring pin do in a Sinotruk truck?

The leaf spring pin acts as the hinge point where the leaf spring eye connects to the chassis bracket. It allows the spring assembly to pivot smoothly as the suspension compresses and rebounds under load. Without a properly functioning pin, the spring cannot articulate correctly, leading to uneven tire wear, poor ride quality, and accelerated bushing deterioration.

How do I know when the leaf spring pin 99100520710 needs replacement?

Common signs include clunking or squeaking noises from the suspension during driving, visible play or looseness at the spring eye connection, uneven wear patterns on the pin surface, and misalignment of the leaf spring pack. Additionally, if you notice the truck pulling to one side during braking, a worn leaf spring pin could be the culprit.

Is this leaf spring pin compatible with both front and rear leaf springs?

Part number 99100520710 is designed for specific mounting positions on Sinotruk vehicles. To confirm whether it fits your front spring, rear spring, or both, we recommend verifying against your vehicle’s parts catalog or contacting our technical team with your exact truck model and VIN.

What material is used, and how does it handle heavy loads?

This pin is manufactured from high-strength alloy steel that undergoes heat treatment to achieve optimal hardness and toughness. The result is a component that resists shear stress, fatigue cracking, and surface wear — even when your Sinotruk operates at maximum gross vehicle weight over rough terrain.

Can I order this leaf spring pin with my own brand packaging?

Absolutely. Mettlead offers white-label and custom packaging services. You can have your company logo, part number system, and branding printed directly on the box. This is especially popular among aftermarket distributors who want to build brand recognition in their local markets.

How should I install the leaf spring pin to ensure longevity?

For best results, always replace the corresponding bushings when installing a new leaf spring pin. Apply appropriate grease to the pin surface before insertion, torque the retaining hardware to factory specifications, and inspect the bracket bore for wear or elongation. Proper installation significantly extends the service interval of both the pin and surrounding components.

Ready to Order Your Leaf Spring Pin 99100520710?

Getting the right parts at the right price shouldn’t be complicated. Whether you’re restocking your warehouse or sourcing a single replacement for an urgent repair, Mettlead makes the process straightforward.

Here’s what you can expect when you work with us:

1. Competitive Factory-Direct Pricing — No middlemen, no inflated margins.
2. Fast and Reliable Global Shipping — We know downtime costs money, so we prioritize quick dispatch.
3. Flexible, Secure Payment Options — Multiple methods to suit your business needs.
4. Dedicated Support — Our team helps you verify part numbers, confirm fitment, and resolve any questions.

Don’t let a worn leaf spring pin compromise your fleet’s performance. Contact us today to request a quote, confirm availability, or discuss bulk order pricing for the Leaf Spring Pin 99100520710 Sinotruk.

Looking for additional Sinotruk components? Visit our comprehensive Sinotruk Truck Parts catalog to find everything from engine parts to chassis accessories — all from one reliable source.