Product Introduction

This precision-engineered hollow bolt serves as both a structural fastener and a fluid passage, enabling secure mounting and pressure-tight fluid transfer in critical vehicle systems.

• Structure & Material:

• Material: High-strength alloy steel, heat-treated for tensile strength and pressure resistance.

• Head: Hexagonal head for wrench installation.

• Hole Design: Axial internal bore and a radial outlet hole to channel fluid from the threaded port to the connected component.

• Finish: Zinc-plated (gold/yellow) for corrosion resistance and anti-seizing properties.

  • Performance:

• Provides a leak-free fluid path while maintaining a high-torque structural connection.

• Designed to withstand system pressures up to 10–16 bar, ensuring reliable operation in heavy-duty braking and pneumatic systems.

  • Durability: The hardened steel construction and corrosion-resistant coating withstand vibration, temperature fluctuations, and fluid exposure, ensuring long service life.

Core Function

1. Fluid Passage: Acts as a conduit for hydraulic oil or compressed air between system components.

2. Structural Fastening: Secures brake calipers, clutch cylinders, or pneumatic valves to the chassis or transmission.

3. Leak Prevention: The precision-machined bore and sealing interface ensure a pressure-tight connection, eliminating fluid loss.

Hollow Bolt 190003962627 for SINOTRUK HW Series Gearbox – Factory Direct Supply

When your SINOTRUK HW series gearbox demands precision-engineered components, settling for anything less than an exact-fit hollow bolt simply isn’t an option. The Hollow Bolt 190003962627 is purpose-built to maintain hydraulic integrity and secure fluid passage within the HW gearbox assembly. Sourced directly from our factory lines at Mettlead, this gearbox hollow bolt delivers OEM-grade performance at a wholesale price that protects your margins.

As a dedicated supplier of SINOTRUK HOWO truck parts and gearbox components, Mettlead understands exactly what heavy-duty distributors need: verified part numbers, consistent quality, and dependable lead times. That’s precisely what we deliver with every shipment.

Key Features and Benefits of Hollow Bolt 190003962627

This SINOTRUK gearbox hollow bolt isn’t just a fastener — it’s a critical fluid-channeling component that keeps your HW transmission running smoothly under extreme loads. Here’s why wholesale buyers trust it:

• OEM Part Number 190003962627 – Guarantees direct interchangeability with the original SINOTRUK specification, so there’s zero guesswork during installation.
• Precision-Machined Internal Bore – The hollow channel is engineered to exact tolerances, ensuring unobstructed lubricant flow throughout the gearbox assembly.
• High-Strength Alloy Steel Construction – Heat-treated to withstand the vibration, torque, and thermal cycling typical of heavy-truck transmissions.
• Corrosion-Resistant Surface Finish – Zinc-plated or phosphate-coated to resist rust in humid and salt-spray environments, extending service life significantly.
• Factory-Direct Wholesale Pricing – By cutting out intermediaries, we offer competitive unit costs that give distributors and agents healthier profit margins.
• Strict Quality Control – Each batch undergoes dimensional inspection, hardness testing, and thread gauge verification before shipping.

In other words, when you stock the Hollow Bolt 190003962627 from Mettlead, you’re offering your own customers a part that installs correctly the first time and performs reliably for the long haul.

Technical Specifications – Hollow Bolt 190003962627 SINOTRUK HW Gearbox

Application Scenario – Where Does This Hollow Bolt Fit?

The Hollow Bolt 190003962627 is specifically designed for the SINOTRUK HW series gearbox, which is widely deployed across HOWO heavy-duty trucks, mixer trucks, dump trucks, and tractor units. Within the transmission, this hollow bolt serves as a banjo-style connector that channels pressurized lubricating oil to critical moving parts inside the gearbox housing.

If you’re supplying parts for the following vehicle and gearbox combinations, this bolt belongs in your inventory:

• SINOTRUK HOWO A7 / T7H / T5G trucks equipped with HW19710 / HW19712 transmissions
• SINOTRUK HOWO heavy-duty dump trucks with HW15710 gearbox assemblies
• SITRAK C7H series using HW gearbox variants
• Any SINOTRUK platform referencing OEM part number 190003962627 in its gearbox BOM

Because the HW gearbox family is one of the most common transmissions across China’s heavy truck fleet — and increasingly popular in export markets across Africa, Southeast Asia, and the Middle East — demand for this hollow bolt remains consistently strong. Stocking it means fewer back-orders and faster turnaround for your workshop clients.

Explore our full range of SINOTRUK HOWO gearbox parts to build a comprehensive transmission parts catalog for your customers.

OEM/ODM Capability and Wholesale Support

At Mettlead, we go beyond simply shipping parts. We partner with distributors, agents, and fleet operators to create a smooth, profitable supply chain. Here’s how we support your business:

• White-Label and Custom Packaging – Want your brand on the box? We offer neutral packaging or fully customized labels, so you can build brand equity in your local market without manufacturing a single part.
• Flexible MOQ – Whether you’re testing a new market with a trial order or scaling up with container loads, we adapt our minimum quantities to match your growth stage.
• Comprehensive SINOTRUK Parts Range – The Hollow Bolt 190003962627 is just one of thousands of genuine-equivalent parts we carry for SINOTRUK, SHACMAN, FAW, WEICHAI, DONGFENG, and FOTON platforms. One supplier, one shipment, lower logistics costs.
• Strict Quality Control – Every component passes through dimensional checks, material hardness testing, and visual inspection. We stake our reputation on consistency.
• Secure and Flexible Payment – Choose from T/T, L/C, Western Union, or Trade Assurance — whatever keeps your procurement team comfortable.
• Factory Visit Welcome – We encourage serious partners to visit our facility in China to see our quality control processes firsthand and build lasting trust.

Customer Case Study – Hollow Bolt 190003962627 Bulk Order for East African Distributor

In early 2024, a truck parts distributor based in Dar es Salaam, Tanzania, reached out to Mettlead with a specific challenge. Their workshop clients were struggling with inconsistent quality on SINOTRUK HW gearbox hollow bolts sourced from multiple middlemen. Thread tolerances varied batch to batch, leading to oil leaks and costly rework.

After receiving a sample batch of our Hollow Bolt 190003962627, their quality team confirmed that dimensional accuracy and surface finish met OEM specifications consistently across all pieces tested. They subsequently placed a quarterly standing order covering this hollow bolt alongside other HW gearbox fasteners and seals.

The result? Their return rate on gearbox bolts dropped to near zero, workshop complaints disappeared, and they consolidated five separate suppliers down to one — Mettlead. Today, they carry our full SINOTRUK HW series gearbox parts line and have expanded into SHACMAN transmission components as well.

This is the kind of partnership we build: solving real quality problems with reliable parts and transparent communication.

Frequently Asked Questions – Hollow Bolt 190003962627 SINOTRUK HW Gearbox

What exactly does the Hollow Bolt 190003962627 do inside the HW gearbox?

Think of it as a dual-purpose component. It secures adjoining gearbox parts like a standard bolt, but its hollow core simultaneously acts as a fluid conduit. Pressurized transmission oil flows through the internal bore to lubricate gears and synchronizers. If this bolt fails or leaks, lubrication starves critical components, eventually leading to premature gear wear or even gearbox seizure.

Is this hollow bolt compatible with all HW gearbox models?

The part number 190003962627 is specified by SINOTRUK for use in the HW family of transmissions, including common variants like HW19710, HW19712, and HW15710. However, because SINOTRUK occasionally revises assemblies, we always recommend confirming the part number against your specific gearbox nameplate or OEM parts catalog before ordering in bulk.

How can I verify the quality of this hollow bolt before placing a large order?

We encourage every new customer to request a sample shipment first. You can measure thread pitch, diameter, bore size, and overall length against OEM drawings. Additionally, we provide batch inspection reports upon request, covering hardness (HRC), plating thickness, and dimensional tolerances.

What causes a gearbox hollow bolt to fail?

The most common failure modes include over-torquing during installation (which cracks the bolt head or distorts the bore), corrosion from contaminated transmission fluid, and fatigue from prolonged vibration. Using a correctly specified replacement — like our 190003962627 hollow bolt — and following the manufacturer’s torque values minimizes these risks considerably.

Can I order this hollow bolt with my own brand packaging?

Absolutely. Mettlead offers white-label and fully custom packaging options. You provide your brand artwork and box specifications; we handle printing and packing. This service is available even at moderate order quantities, making it accessible for growing distributors who want to establish their own aftermarket brand.

What is the typical lead time for wholesale orders?

For in-stock items like the Hollow Bolt 190003962627, we typically ship within 3–7 business days after payment confirmation. Larger custom-packaged orders may require 10–15 days for packaging production. We communicate timelines clearly before you commit, so there are no surprises.

Ready to Secure Your Supply of Hollow Bolt 190003962627?

Whether you’re restocking a proven fast-mover or adding SINOTRUK HW gearbox parts to your catalog for the first time, Mettlead is here to make the process simple, fast, and profitable for your business.

Here’s your next step: send us a quick inquiry with your target quantity, preferred packaging, and destination country. Our team will respond within 24 hours with a detailed quotation tailored to your needs.

Contact us now to request pricing, samples, or a full SINOTRUK gearbox parts list. Let’s build a supply partnership that keeps your customers’ trucks moving and your margins healthy.

Mettlead — Your factory-direct source for China heavy truck parts, delivered worldwide.