Product Introduction

Structure

This leaf spring single plate is a precision-formed high-strength steel component designed for heavy-duty truck leaf spring suspension systems. It features a long, flat profile with a slight camber, precision-cut edges, and a central mounting hole for installation. The ends are formed into angled, non-cylindrical tips, and the surface is finished with a dark anti-corrosion coating. Markings such as “16X90” and part numbers are clearly visible for easy identification and traceability.

Performance

Manufactured from premium-grade spring steel (e.g., 60Si2Mn) and subjected to controlled heat treatment, this single plate delivers exceptional tensile strength, fatigue resistance, and consistent spring rate. It is designed to withstand the extreme dynamic loads, impacts, and torsional forces encountered in heavy-duty operation, maintaining its structural integrity in temperatures ranging from -40°C to 120°C. The anti-corrosion coating provides superior protection against rust, salt spray, and chemical exposure, ensuring long-term durability in diverse operating environments.

Core Function

1. Serves as a secondary load-bearing element within the leaf spring assembly, contributing to the overall spring rate and load capacity of the suspension system.

2. Works in conjunction with other leaf plates to absorb and dissipate road impacts and vibrations, ensuring a smooth, stable ride.

3. Maintains proper suspension geometry, preventing excessive deflection and ensuring consistent vehicle handling and stability.

4. Enhances vehicle safety and durability by providing a robust, reliable load-bearing solution that can withstand the extreme conditions of heavy-duty operation, reducing the risk of component failure and improving overall reliability.

Leaf Spring Single Plate WG9731520041-2 Sinotruk – Heavy-Duty Suspension Replacement Part

Meta Description: Buy Leaf Spring Single Plate WG9731520041-2 for Sinotruk HOWO heavy trucks. Factory-direct pricing, high-strength steel, anti-corrosion coated. Get a fast quote from Mettlead today.

When your heavy-duty truck’s suspension starts losing its resilience—or worse, a leaf spring plate cracks under constant load—you need a replacement that restores performance without compromise. The Leaf Spring Single Plate WG9731520041-2 Sinotruk is a precision-formed, high-strength steel suspension component engineered to meet the demanding requirements of Sinotruk HOWO series trucks. Sourced directly from our factory in China, this single plate leaf spring delivers the exact fitment, load-bearing capacity, and durability that fleet managers and procurement professionals expect. At Mettlead, we make it simple to keep your trucks on the road—with competitive pricing, reliable quality, and fast global delivery.

Key Features and Benefits of the Leaf Spring Single Plate WG9731520041-2

This isn’t just a piece of steel—it’s a critical link between your truck’s chassis and the road. Here’s what sets this leaf spring single plate apart:

• High-Strength Steel Construction: Manufactured from premium-grade spring steel, this plate withstands repeated flexing and heavy loads without premature fatigue or fracture.
• Precision Camber Design: The slight, factory-set camber ensures optimal load distribution across the suspension assembly, maintaining ride height and stability under full payload.
• Anti-Corrosion Surface Coating: A dark protective finish guards against rust, road salt, and moisture—extending service life even in harsh operating environments.
• Central Mounting Hole for Easy Installation: The precisely drilled center bolt hole guarantees accurate alignment with existing leaf spring packs, reducing installation time significantly.
• Formed Non-Cylindrical End Tips: The angled end profiles are designed to interface smoothly with spring hangers and shackles, preventing stress concentration and ensuring quiet operation.
• Clear Part Number Markings: Stamped identifiers including “16X90” and the OEM part number WG9731520041-2 allow for quick verification and traceability during inventory management.
• Direct OEM Replacement: Engineered to match original Sinotruk specifications, so you can install with confidence—no modifications required.

In other words, this leaf spring single plate is built to perform exactly like the original, while our factory-direct model means you pay less without sacrificing quality.

Application Scenarios – Where This Leaf Spring Single Plate Fits

Understanding exactly when and where this part belongs helps you make the right purchasing decision. The Leaf Spring Single Plate WG9731520041-2 is designed for the following applications:

• Compatible Truck Models: Sinotruk HOWO heavy-duty trucks equipped with multi-leaf spring rear suspension systems.
• Component Type: Single plate leaf spring—used as an individual replacement plate within a leaf spring pack assembly.
• System Category: Chassis suspension system — browse more components in our Chassis Parts Category.
• Replacement Scenarios: This plate should be replaced when you observe cracking, complete fracture, loss of camber (sagging), or elasticity failure that causes uneven ride height or poor load handling.
• Maintenance Context: Commonly replaced during scheduled suspension overhauls, post-accident repairs, or when drivers report excessive bouncing, bottoming out, or uneven tire wear.

Whether you’re managing a fleet of long-haul trucks or servicing vehicles in a regional workshop, having the correct OEM-spec leaf spring plate on hand minimizes downtime and keeps operations running smoothly.

Technical Specifications

Accurate specifications matter—especially when you’re sourcing parts across borders. Below you’ll find the detailed parameters for this leaf spring single plate:

Need to verify fitment for your specific truck model or year? Don’t hesitate to contact us with your VIN or chassis number, and our team will confirm compatibility within 24 hours.

OEM/ODM Capabilities – Tailored to Your Business Needs

At Mettlead, we understand that different markets have different requirements. That’s why we offer flexible manufacturing and branding options for bulk buyers:

• White-Label Packaging: Receive products in neutral packaging, ready for your own branding and distribution channels.
• Custom Packaging: We can produce packaging with your company logo, part numbers, and barcodes—helping you build brand recognition in your local market.
• Strict Quality Control: Every leaf spring plate undergoes hardness testing, dimensional inspection, and surface quality checks before shipment. We maintain consistency across large batch orders.
• Flexible Order Quantities: Whether you need a small trial order or container-load volumes, we accommodate your procurement schedule.
• Factory Visits Welcome: We invite procurement managers to visit our facilities in China to inspect production processes, quality systems, and inventory firsthand.

Explore our full range of Sinotruk HOWO Truck Parts or browse our complete Sinotruk Parts Catalog to find everything you need from a single supplier.

Frequently Asked Questions (FAQ)

What causes a leaf spring single plate to fail?

Over time, repeated loading and unloading cycles cause metal fatigue in the spring steel. Additionally, corrosion from road salt or moisture can weaken the plate’s cross-section. Overloading the truck beyond its rated capacity accelerates cracking. Once a plate loses its camber or develops visible cracks, it should be replaced immediately to prevent cascading damage to adjacent plates in the spring pack.

How do I know if this leaf spring plate fits my truck?

The part number WG9731520041-2 is specific to Sinotruk HOWO heavy-duty trucks. To confirm fitment, match this number against your truck’s original parts catalog or provide us with your vehicle identification number (VIN). Our technical team will verify compatibility before you place your order.

Can I replace just one plate in the leaf spring pack?

Yes, individual plates can be replaced when only one has fractured or lost elasticity. However, if multiple plates show signs of fatigue or corrosion, it’s more cost-effective and safer to replace the entire leaf spring assembly. Inspect all plates during maintenance to make an informed decision.

What is the “16X90” marking on the plate?

This marking indicates the plate’s cross-sectional dimensions—16 mm thickness and 90 mm width. These dimensions are critical for ensuring the replacement plate matches the load-bearing characteristics of the original. Using a plate with incorrect dimensions can lead to premature failure or suspension imbalance.

How does the anti-corrosion coating extend service life?

The dark surface coating acts as a barrier between the spring steel and environmental elements like water, road chemicals, and debris. Without this protection, bare steel would develop surface rust that gradually pits the material, creating stress risers where cracks initiate. The coating significantly delays this process, especially in humid or coastal climates.

What’s the typical lead time for bulk orders?

Standard orders ship within 3–7 business days from our warehouse. For large custom or white-label orders, production typically takes 15–25 days depending on quantity. We recommend contacting our sales team early to lock in production slots during peak seasons.

Ready to Source Your Leaf Spring Single Plate WG9731520041-2?

Stop wasting time with middlemen and inflated prices. Mettlead connects you directly to the factory floor—giving you access to genuine-quality Sinotruk suspension parts at prices that protect your margins. Whether you’re restocking your warehouse or fulfilling an urgent repair order, we’re ready to move fast.

Here’s what to do next:

1. Request a Quote: Contact us now with your required quantity and delivery destination.
2. Confirm Fitment: Share your truck model or VIN, and we’ll verify part compatibility.
3. Receive Your Shipment: Enjoy fast, reliable delivery with secure payment options that work for your business.

Partner with Mettlead today—your trusted factory-direct source for Sinotruk HOWO truck parts and Chinese heavy truck components worldwide.