Product Introduction

This double-end stud is a high-strength fastener designed for secure, vibration-resistant mounting of heavy-duty vehicle components.

• Structure & Material: Manufactured from high-grade alloy steel, with precision-machined threads on both ends and a smooth central shank. The surface features a zinc-plated, multi-colored (rainbow) coating for superior corrosion resistance.

• Performance: The dual-thread design allows for separate tightening of the stud and the nut, creating a rigid, anti-loosening connection that withstands high vibration loads.

• Durability: The hardened steel construction and corrosion-resistant coating ensure long service life even in harsh operating environments.

Core Function

1. Secure Component Mounting: Provides a rigid, vibration-resistant connection for transmission and engine components, preventing loosening and mechanical failure.

2. Dual-Thread Design: Allows for precise torque control during installation, ensuring consistent clamping force and reliable performance.

3. Corrosion Resistance: The zinc-plated coating protects against rust and corrosion, maintaining fastener integrity over long service intervals.

Screw Q1231035 SINOTRUK HW Series Gearbox – OEM-Quality Bolt for Heavy-Duty Transmission

When your SINOTRUK HW series gearbox demands precision fastening, the Screw Q1231035 delivers exactly what you need. This OEM-specification bolt is purpose-engineered to withstand the extreme torque, vibration, and thermal cycling inside heavy-duty transmissions. Whether you’re maintaining a fleet or stocking your parts warehouse, this gearbox screw keeps drivetrains running smoothly — and keeps costly downtime off your schedule.

At Mettlead, we supply genuine-quality SINOTRUK gearbox components at factory-direct prices from China, so you get reliable parts without the inflated middleman markup. Explore our full range of SINOTRUK HOWO truck parts and gearbox components to complete your order in one place.

Key Features and Benefits of Screw Q1231035

Every detail of this SINOTRUK HW gearbox screw is designed to meet the brutal demands of commercial trucking. Here’s why procurement managers trust it:

• OEM-Matching Precision: Manufactured to exact SINOTRUK specifications, the Q1231035 screw ensures seamless fitment within HW series gearbox assemblies — no modifications required.
• High-Strength Material: Crafted from hardened alloy steel with surface treatment for corrosion resistance, this bolt handles continuous torque loads and temperature fluctuations without loosening or failing.
• Vibration Resistance: Heavy-duty thread design maintains clamp load even under the intense vibration generated inside a working transmission, reducing re-torque intervals.
• Extended Service Life: Thanks to strict quality control during production, each screw delivers consistent fatigue resistance over hundreds of thousands of kilometers.
• Cost-Effective Maintenance: Factory-direct pricing from Mettlead means you keep MRO budgets lean while never compromising on gearbox reliability.

In short, this screw isn’t just a fastener — it’s an insurance policy for your transmission’s structural integrity.

Technical Specifications – Screw Q1231035 SINOTRUK HW Series Gearbox

Need to browse more transmission components? Visit our dedicated SINOTRUK HOWO gearbox parts page for a complete catalog.

Application Scenarios – Where Screw Q1231035 Fits

The Screw Q1231035 is specifically designed as a transmission fastening bolt for the SINOTRUK HW series gearbox. You’ll find it performing critical duties in the following scenarios:

• Gearbox Housing Assembly: Securing the main casing sections of the HW gearbox during factory assembly or field overhaul.
• Transmission Cover Mounting: Fastening side covers and inspection plates that must seal against oil leakage while enduring vibration.
• Fleet Maintenance Programs: Bulk replacement during scheduled transmission service intervals for logistics, mining, and construction fleets.
• Aftermarket Rebuilds: Ensuring rebuilt HW gearboxes meet OEM torque specifications before re-installation.

Compatible Vehicle Models: SINOTRUK HOWO A7, HOWO T7H, SITRAK C7H, SITRAK C5H, and any heavy truck platform running an HW series manual or AMT gearbox. This bolt is also cross-applicable to select SHACMAN and other Chinese-brand trucks that use SINOTRUK-licensed HW transmissions.

OEM/ODM Capability – Tailored to Your Business

Mettlead understands that different markets have different packaging, labeling, and specification needs. That’s why we offer flexible OEM and ODM services for the Screw Q1231035 and our entire gearbox parts range:

• White-Label Packaging: Ship under your own brand identity with custom boxes, labels, and part number stickers.
• Custom Packaging: Choose bulk industrial packs for workshop distribution or retail-ready blister packs for parts stores.
• Strict Quality Control: Every batch undergoes dimensional inspection, hardness testing, and surface-treatment verification before leaving our facility.
• Flexible MOQ: Whether you need 500 pieces or 50,000, we scale production to match your demand cycles.
• Factory Visits Welcome: We invite procurement teams to inspect our manufacturing lines in person — transparency builds trust.

From quoting to delivery, our team keeps you informed at every step, because clear communication is just as important as quality parts.

Customer Case Study – Screw Q1231035 for an East African Fleet Operator

In early 2024, a fleet management company operating 120+ SINOTRUK HOWO A7 tippers in Tanzania reached out to Mettlead with an urgent requirement. Their existing supplier had delivered substandard gearbox screws that failed under load, causing oil leaks and unplanned transmission teardowns across multiple units.

After reviewing their specifications, we confirmed the Screw Q1231035 for SINOTRUK HW series gearbox was the exact component they needed. We shipped a trial order of 2,000 pieces with full dimensional inspection reports. Within three weeks of installation, their maintenance team reported zero re-torque failures and no oil seepage — a dramatic improvement over the previous supplier’s product.

The result? They signed a quarterly supply agreement for Q1231035 gearbox screws along with additional HW transmission components, reducing their per-unit maintenance cost by an estimated 18%. Today, they rely on Mettlead as their primary source for SINOTRUK HW gearbox bolts and fasteners.

Frequently Asked Questions – Screw Q1231035 SINOTRUK HW Gearbox

What exactly is the Screw Q1231035, and where does it sit inside the gearbox?

The Q1231035 is a high-strength metric bolt used to fasten critical structural sections of the SINOTRUK HW series gearbox. It secures housing components and covers that must resist both internal oil pressure and external vibration during operation. In other words, it’s one of the fasteners that holds your entire transmission together.

Which gearbox models is the Screw Q1231035 compatible with?

This screw fits the full HW family of SINOTRUK transmissions, including the HW19710, HW15710, HW19712, and HW25716. It’s also compatible with HW-derived gearboxes found in select SITRAK, HOWO A7, and T7H platforms.

What grade of steel is the Q1231035 screw made from?

It’s manufactured from Class 10.9 high-strength alloy steel, which provides excellent tensile strength and fatigue resistance under the heavy cyclic loads typical of commercial truck transmissions.

Can I order the Screw Q1231035 with my own brand packaging?

Absolutely. Mettlead offers white-label and fully custom packaging options. You can supply your artwork, or our design team can help you create professional packaging that matches your market positioning.

How do I verify this screw will fit my specific application?

Cross-reference the OEM part number Q1231035 against your gearbox assembly manual or parts catalog. If you’re unsure, send us your gearbox model and VIN, and our technical team will confirm compatibility before you place an order.

What is the recommended torque specification for installing this bolt?

Always follow the torque values specified in the SINOTRUK HW gearbox service manual for position Q1231035. Over-torquing can stretch the fastener; under-torquing allows loosening. If you need the specification sheet, our team can supply it with your order.

How does Mettlead ensure the quality of each batch?

Every production run undergoes dimensional measurement, Rockwell hardness testing, thread-gauge verification, and surface-coating thickness inspection. We maintain batch traceability records so any quality concern can be traced back to its source immediately.

Ready to Secure Your Gearbox Supply? Let’s Talk.

Stop risking transmission failures with uncertain-quality fasteners. The Screw Q1231035 for SINOTRUK HW series gearbox is in stock and ready to ship at factory-direct pricing — with the quality control your fleet depends on.

Whether you need a sample batch or a long-term supply contract, our team responds within 24 hours with pricing, lead times, and technical support.

Get your quote today: Contact Mettlead now and tell us your required quantity, destination, and timeline. We’ll handle the rest.