Product Introduction

• Structure: Precision-stamped integral washer made of high-strength carbon structural steel, with surface galvanized passivation treatment for double anti-corrosion protection. It features a smooth and flat upper and lower surface, precise inner and outer diameter size tolerance, and no burrs or edge warping on the stamping edge. The thickness is uniformly designed to ensure uniform stress distribution during fastening

• Performance: The high-strength steel material ensures excellent pressure resistance and deformation resistance, without flattening or deformation under the high pre-tightening force of high-strength bolts; galvanized passivation surface treatment has strong anti-rust and anti-corrosion performance, adapting to harsh working environments such as rain, dust and oil erosion; precise size tolerance ensures close fit with bolt and connecting surface, no radial displacement during use

Core Function

1. Stress Distribution: Evenly distributes the pre-tightening force of the bolt on the surface of the connected part, avoiding local stress concentration and preventing the connected part from being crushed or deformed due to excessive local pressure

2. Anti-Loosening Auxiliary: In cooperation with high-strength bolts and nuts, it increases the friction force between the fastening surfaces, effectively preventing the bolt from loosening due to vehicle vibration during driving, ensuring the connection reliability of key parts

3. Corrosion Isolation: Isolates the direct contact between the bolt/nut and the connected part metal surface, preventing electrochemical corrosion caused by different metal contact, and protecting the fastening and connected parts.

Washer MQ6151140419 Sinotruk Sitrak – Premium Sealing & Cushioning Gasket

When your Sitrak heavy-duty truck demands reliable sealing performance, the Washer MQ6151140419 Sinotruk Sitrak delivers exactly that. Engineered to OEM specifications, this precision-machined washer serves as a critical sealing and cushioning component that prevents fluid leakage, absorbs vibration, and extends the service life of adjacent assemblies. Whether you are maintaining a fleet or stocking your parts warehouse, this genuine-spec gasket ensures every bolt joint stays tight under the harshest operating conditions.

At Mettlead, we supply this washer directly from our China-based factory, which means you get factory-direct pricing without sacrificing quality. As a dedicated global supplier of SINOTRUK, SITRAK, HOWO, SHACMAN, FAW, WEICHAI, DONGFENG, and FOTON truck parts, we understand what procurement managers need most: accurate fitment, competitive cost, and dependable delivery.

Key Features and Benefits of Washer MQ6151140419

This washer is far more than a simple flat ring. It is a purpose-built sealing element that plays a vital role in maintaining the structural integrity of your Sitrak truck’s mechanical systems. Here is what sets it apart:

• OEM-Grade Fitment – Manufactured to match the original Sinotruk Sitrak dimensions precisely, so installation is seamless with no modifications needed.
• Superior Sealing Performance – The washer creates a uniform contact surface that prevents oil, coolant, or hydraulic fluid from escaping bolt joints.
• Vibration Dampening – Absorbs micro-vibrations generated during highway and off-road operation, reducing fatigue stress on threaded fasteners.
• Corrosion-Resistant Material – Treated to withstand moisture, road salt, and chemical exposure common in commercial trucking environments.
• Extended Service Life – Strict quality control during production ensures consistent hardness and thickness, translating to longer replacement intervals.
• Cost-Effective Maintenance – Factory-direct supply eliminates middleman markups, allowing fleet operators to stock critical spares without overspending.

In short, choosing the right washer protects not just the immediate joint but the entire assembly it supports. A failed gasket can lead to leaks, increased wear, and costly unplanned downtime — something no procurement manager wants on their watch.

Technical Specifications – Washer MQ6151140419 Sinotruk Sitrak

Note: If you need exact dimensional measurements (inner diameter, outer diameter, thickness) for cross-referencing, our team can provide detailed technical drawings upon request.

Application Scenario – Where Does Washer MQ6151140419 Fit?

The Washer MQ6151140419 is specifically designed for Sinotruk Sitrak heavy-duty trucks. It functions as a sealing and cushioning gasket within bolted assemblies where preventing fluid bypass and dampening mechanical vibration are essential.

Typical application contexts include:

• Engine and transmission mounting joints – where thermal cycling and vibration demand a reliable buffer layer.
• Hydraulic and pneumatic system connections – where even minor leaks compromise braking or steering performance.
• Chassis and frame fastening points – where road shock loads constantly stress bolt connections.

Because this washer is matched to the Sitrak platform, it accommodates the specific bolt patterns, torque specs, and surface finishes found across the Sitrak model range. If you are sourcing parts for mixed Sinotruk fleets, be sure to explore our full Sitrak Heavy-Duty Parts catalog for compatible components.

OEM / ODM Capability and Custom Packaging

Mettlead does more than simply ship parts. We partner with distributors, wholesalers, and fleet operators who need flexible sourcing solutions tailored to their market:

• White-Label Packaging – We can ship Washer MQ6151140419 under your own brand label, giving you full control over your market positioning.
• Custom Packaging Options – Whether you need individual polybags, branded boxes, or bulk cartons, we accommodate your packaging preferences.
• Strict Quality Control – Every batch undergoes dimensional inspection, material verification, and surface quality checks before dispatch.
• Factory Visits Welcome – We invite prospective partners to visit our production facility in China and verify our quality processes firsthand.

These capabilities make us a strong long-term supply partner rather than a one-time vendor. Consistency matters when your reputation depends on the parts you distribute.

Frequently Asked Questions – Washer MQ6151140419

What is the primary function of Washer MQ6151140419?

This washer serves as a sealing and cushioning gasket. It sits between bolt surfaces to create a tight seal that prevents fluid leaks while simultaneously absorbing vibrations that could loosen fasteners over time.

Is this washer a direct replacement for the original Sitrak part?

Yes. Washer MQ6151140419 is manufactured to match OEM dimensions and material specifications, so it drops directly into any assembly that calls for this part number without any modifications.

Can I reuse this washer after disassembly?

Generally, sealing washers should be replaced during each disassembly event. Once compressed and torqued, the surface profile adapts to the mating faces. Reusing it may compromise the seal integrity, especially in fluid-carrying systems.

What material is this washer made from?

It is made from an OEM-equivalent metal or composite material (depending on the specific application variant) with an anti-corrosion surface treatment designed for long-term durability in commercial vehicle environments.

How do I confirm this washer fits my specific Sitrak truck model?

Cross-reference the OEM part number MQ6151140419 with your vehicle’s parts manual. If you are unsure, send us your VIN or assembly diagram and our technical team will confirm compatibility. You can also browse our Sinotruk Sitrak Truck Parts Full Category Guide for related components.

Does the washer come with any quality guarantee?

Absolutely. Every piece passes our strict quality control process, including dimensional accuracy checks and surface finish inspections. We stand behind the parts we ship.

Ready to Source Washer MQ6151140419 at Factory-Direct Pricing?

Stop overpaying for Sitrak sealing components through multiple intermediaries. Mettlead offers genuine-spec Washer MQ6151140419 Sinotruk Sitrak at competitive factory-direct prices, with fast delivery and flexible, secure payment methods designed for international B2B transactions.

Whether you need a small trial order or ongoing bulk supply, our team is ready to provide a quote tailored to your requirements. Take the next step now:

Contact Us for a Quick Quote →