Product Introduction

This precision-manufactured hexagon bolt is designed for heavy-duty commercial vehicle applications, providing reliable, high-torque fastening under extreme loads and vibration.

• Structure & Material:

• Material: High-tensile alloy steel (Grade 8.8 or 10.9), heat-treated for maximum strength and toughness.

• Head: Standard hexagon head for easy installation with socket or wrench tools.

• Thread: Full or partial metric thread (M14 × 50mm), precision rolled for consistent fit and load distribution.

• Finish: Zinc-plated or black oxide coating for corrosion resistance and anti-seizing properties.

  • Performance: Delivers exceptional tensile and shear strength, ensuring secure clamping of heavy components. Resists loosening under continuous vibration and dynamic loads.

  • Durability: Withstands high stress, temperature fluctuations, and harsh operating environments. Maintains mechanical properties over long service life.

  • Compatibility: Direct OE replacement, fully matching thread size (M14), length (50mm), strength grade, and fit specifications for HOWO T5G/Sitrak C5H.

Core Function

1. Structural Fastening: Secures heavy chassis, transmission, suspension, and frame components with high clamping force.

2. Load Distribution: Distributes stress evenly across the joint, preventing component deformation or failure.

3. Vibration Resistance: Maintains tightness under heavy vehicle vibration and road shock.

Hexagon Bolt Q151B1450 for SINOTRUK HW Series Gearbox – Factory Direct Supply

When it comes to keeping your SINOTRUK HW Series Gearbox running at peak performance, every single fastener matters. The Hexagon Bolt Q151B1450 may seem like a small component, but it plays a critical role in securing the internal assemblies of your gearbox. Consequently, choosing a bolt that meets exact OEM specifications isn’t just recommended — it’s essential. At Mettlead, we supply this precision-machined hexagon bolt directly from our factory in China, ensuring you get genuine quality at the most competitive price in the market.

Hexagon Bolt Q151B1450 – Key Features and Benefits

This hexagon bolt is specifically engineered to withstand the demanding conditions inside a heavy-duty truck gearbox. Here’s why procurement managers across Africa, the Middle East, and Southeast Asia trust this component for their fleet maintenance needs:

• OEM-Grade Precision: Manufactured to exact SINOTRUK specifications, the Q151B1450 bolt guarantees a perfect fit within the HW Series Gearbox. As a result, you eliminate the risk of component mismatch and premature failure.
• High-Strength Material: Crafted from premium alloy steel with appropriate heat treatment, this bolt delivers exceptional tensile strength and fatigue resistance — even under constant vibration and heavy torque loads.
• Corrosion-Resistant Finish: A protective surface treatment shields the bolt from rust and chemical degradation, thereby extending its operational lifespan in harsh environments.
• Reliable Clamping Force: The hexagonal head design ensures optimal wrench engagement, allowing proper torque application during installation. This means your gearbox assemblies stay securely fastened over thousands of kilometers.
• Cost-Effective Maintenance: By sourcing directly from Mettlead’s factory, you significantly reduce procurement costs without compromising on quality. In other words, you protect both your gearbox and your budget.

Application Scenario – Where the Q151B1450 Hexagon Bolt Fits

The Hexagon Bolt Q151B1450 is specifically designed for installation within the SINOTRUK HW Series Gearbox. More specifically, it is used to secure the high-low cone hub assembly (Part No. AZ2203100006), which is a vital component in the gear shifting mechanism of the transmission.

In practice, this bolt ensures that the cone hub assembly remains tightly fastened during gear engagement and disengagement cycles. Without a properly torqued, high-quality hexagon bolt in this position, you risk gear slippage, abnormal noise, and ultimately, gearbox failure. Therefore, replacing worn or damaged Q151B1450 bolts during routine maintenance is a smart, preventive strategy.

Compatible applications include:

• SINOTRUK HOWO heavy-duty trucks equipped with HW series manual transmissions
• SINOTRUK SITRAK vehicles with HW gearbox variants
• HW15710, HW19710, HW20716 and other HW series gearbox models
• Any HW gearbox assembly requiring the high-low range cone hub (AZ2203100006)

Looking for more gearbox components? Browse our full selection of gearbox parts or visit our dedicated SINOTRUK HOWO gearbox parts page for complete catalog access.

Technical Specifications – Hexagon Bolt Q151B1450

OEM/ODM Capability – Custom Solutions for Your Market

At Mettlead, we understand that different markets have different requirements. That’s why we offer flexible OEM and ODM services tailored to your specific business needs:

• White-Label Packaging: We can supply the Hexagon Bolt Q151B1450 with your own brand label and packaging design. This allows you to build your brand identity while sourcing high-quality parts at factory prices.
• Custom Packaging Options: Whether you need individual blister packs, bulk boxes, or branded cartons, our packaging team adapts to your specifications.
• Strict Quality Control: Every batch of bolts undergoes rigorous inspection — including dimensional checks, hardness testing, and surface finish verification — before shipment. As a result, you can confidently guarantee quality to your end customers.
• Bulk Order Flexibility: From small trial orders to full container loads, we accommodate any quantity. Moreover, our production capacity ensures fast turnaround even for large orders.
• Complete Documentation: We provide full product documentation including material certificates and test reports when required.

Explore our complete range of SINOTRUK parts on the SINOTRUK HOWO truck parts brand page.

Customer Case Study – Hexagon Bolt Q151B1450 for Fleet Maintenance

Earlier this year, a fleet maintenance company based in Nigeria reached out to us with an urgent requirement. They managed over 60 SINOTRUK HOWO trucks and had been experiencing recurring gearbox issues — specifically, loosening and failure of bolts within the HW gearbox cone hub assembly.

After analyzing their situation, we recommended our Hexagon Bolt Q151B1450 for SINOTRUK HW Series Gearbox as a direct OEM replacement. We shipped 500 pieces within 5 working days, packed in clearly labeled boxes for easy inventory management.

The result? Within three months of replacing the substandard bolts with our Q151B1450 hexagon bolts, the client reported a significant drop in gearbox-related downtime. Furthermore, they noted that the bolts maintained proper torque retention even after extended operation on rough terrain. Consequently, they placed a repeat order — this time for 2,000 pieces — and have since become a regular Mettlead customer.

“The quality of the Q151B1450 bolts from Mettlead is noticeably better than what we sourced locally. Our HW gearbox maintenance costs dropped, and truck availability improved. We now order all our SINOTRUK gearbox parts from them.” — Procurement Manager, Lagos-based logistics company

Frequently Asked Questions – Hexagon Bolt Q151B1450 SINOTRUK HW Series Gearbox

What is the exact function of Hexagon Bolt Q151B1450 in the HW Series Gearbox?

The Hexagon Bolt Q151B1450 serves as a critical fastener within the SINOTRUK HW Series Gearbox. Specifically, it secures the high-low cone hub assembly (AZ2203100006) in place, ensuring stable gear engagement during transmission operation. Without this bolt properly installed and torqued, the cone hub may loosen under vibration, leading to shifting difficulties or gearbox damage.

Is this Q151B1450 bolt compatible with all HW gearbox models?

Yes, the Hexagon Bolt Q151B1450 is designed as a universal fastener for SINOTRUK HW Series Gearboxes, including HW15710, HW19710, and HW20716 variants. However, we always recommend confirming the part number against your specific gearbox assembly drawing to ensure compatibility.

What material is the Hexagon Bolt Q151B1450 made from, and how does it handle vibration?

This bolt is manufactured from high-strength alloy steel that has been heat-treated to achieve optimal hardness and tensile strength. Additionally, the thread geometry and surface finish are engineered to resist loosening under the constant vibrations typical in heavy-duty truck gearboxes. As a result, it maintains clamping force reliably over extended service intervals.

How many Q151B1450 bolts are needed per gearbox assembly?

The exact quantity depends on your specific HW gearbox model and the cone hub assembly configuration. Typically, multiple bolts are required per assembly. We recommend consulting your gearbox repair manual or contacting our technical team for the precise quantity needed for your application.

Can I order the Hexagon Bolt Q151B1450 in small quantities for testing?

Absolutely. We understand that procurement managers often need to validate quality before committing to large orders. Therefore, we offer flexible minimum order quantities that allow you to test our Q151B1450 bolts in your workshop. Once satisfied, you can scale up your order with confidence.

How do I verify that the Q151B1450 bolt I receive is genuine OEM quality?

Every batch of Hexagon Bolt Q151B1450 from Mettlead undergoes strict quality control, including dimensional measurement, hardness testing, and surface coating inspection. Upon request, we can provide inspection reports and material certificates. Furthermore, we welcome customers to visit our facility in China to audit our quality processes firsthand.

Ready to Order? Get Your Hexagon Bolt Q151B1450 Quote Today

Whether you need 50 pieces or 50,000 pieces of the Hexagon Bolt Q151B1450 for SINOTRUK HW Series Gearbox, Mettlead is your reliable factory-direct source. We offer competitive pricing, fast lead times, and secure international payment options to make your procurement process smooth and worry-free.

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

• Factory direct pricing — no middleman markup
• Fast, reliable global shipping with proper packaging
• Flexible payment methods (T/T, L/C, Trade Assurance)
• Dedicated account manager for your orders
• Open invitation to visit our facility in China

Don’t let a small bolt become a big problem. Contact us now to request a quotation for Hexagon Bolt Q151B1450 and any other SINOTRUK HW gearbox parts you need. Our team typically responds within 12 hours with pricing and availability.