Genuine Sinotruk Washer A210401000004 – Precision Shim for Flawless Howo Assembly & Torque Retention
Essential Precision Component for Secure Fastening
The Sinotruk Washer A210401000004 is a genuine OEM precision washer engineered to provide uniform load distribution, prevent thread galling, and maintain proper clamp force in critical bolted joints throughout your Howo and Sinotruk heavy-duty trucks. As an often-overlooked but vital component, the A210401000004 ensures that every fastener in your drivetrain, suspension, and chassis remains securely tightened – a fundamental requirement for safety and reliability on Nigeria’s demanding roads.
This A210401000004 washer features a hardened steel construction with a precision-ground flat surface, offering excellent resistance to deformation and embedding. Its specific inner and outer diameters match Sinotruk’s original specifications, providing optimal bearing area for the corresponding bolts and nuts. Trust the genuine Sinotruk A210401000004 to protect your components from fretting wear and torque relaxation, ensuring your truck remains safely assembled mile after mile.
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Engineering Precision Behind the A210401000004 Washer
The A210401000004 is far more than a simple flat ring – it is a precision-engineered component that plays a critical role in maintaining the integrity of bolted joints under dynamic loads. Manufactured from high-carbon steel and heat-treated to a hardness of 38–42 HRC, this washer resists deformation and embedment, ensuring that the bolt’s clamp force is accurately transmitted to the joint without loss over time.
Its flatness and surface finish are held to tight tolerances, preventing the washer from concentrating stress at any point, which could lead to fatigue failure of the fastener or the joint material. The A210401000004 is also coated with a zinc-phosphate layer that provides corrosion resistance and a consistent coefficient of friction, which is essential for achieving accurate torque-tension relationships during assembly.
In typical Howo truck assemblies, the A210401000004 is used in conjunction with bolts and nuts in applications such as engine mounting brackets, transmission support cross-members, and suspension attachment points. Its specific dimensions ensure that it fits perfectly on the corresponding bolt shank, providing the correct bearing surface to prevent the bolt head or nut from digging into the softer aluminum or cast iron components.
Technical Specifications – Washer A210401000004
| Parameter | Specification |
|---|---|
| OEM Part Number | A210401000004 |
| Product Name | Washer (Flat, hardened) |
| Brand | Sinotruk (Genuine OEM) |
| Material | High-carbon steel (C45E) |
| Hardness (HRC) | 38 – 42 |
| Inner Diameter (ID) | 14.2 mm |
| Outer Diameter (OD) | 28.0 mm |
| Thickness | 2.5 mm |
| Surface Finish | Zinc-phosphate (black) |
| Flatness | ≤ 0.05 mm |
| Operating Temperature | -50°C to +150°C |
| Application | General purpose – engine, transmission, chassis bolting |
| Compatible Models | Howo A7, T7, C7H, HW series; Sinotruk heavy-duty trucks |
Why the Genuine Sinotruk A210401000004 Outperforms Generic Washers
Generic washers are often made from low-grade steel with inconsistent hardness and poor flatness, leading to uneven load distribution and eventual loosening of the fastener. The A210401000004, by contrast, is manufactured to exacting tolerances, with controlled hardness and surface finish that prevent embedding into the joint material. This ensures that the preload applied during torqueing is maintained over the life of the joint, reducing the need for retorquing and preventing premature component wear.
Additionally, the zinc-phosphate coating on the A210401000004 provides a consistent coefficient of friction, which is crucial for torque angle or torque-plus-angle tightening methods. Generic washers often have varying friction characteristics, leading to inconsistent clamp loads and potential joint failure. By choosing the genuine A210401000004, workshop technicians can be confident that every assembly meets the design specifications.
Advanced Manufacturing for Maximum Reliability
Each A210401000004 is manufactured using a precision stamping process, followed by a controlled hardening and tempering cycle that ensures uniform hardness throughout the part. This eliminates the soft spots that can occur in cheaper washers, which can deform under load and reduce the effectiveness of the joint. The washers are then deburred and surface-treated to remove any sharp edges that could damage the bolt or the component surface.
Compatibility and Fitment
The A210401000004 is a direct replacement for the original washer in a wide range of Sinotruk and Howo applications. Its 14.2mm inner diameter is designed to fit M14 bolts, and its 28mm outer diameter provides an optimal bearing surface for the corresponding nut or bolt head. Always verify the bolt size and torque requirements for your specific application, and ensure that the washer is installed with the correct orientation (flat side against the joint).
Explore the complete range of genuine Howo Parts available for your fleet, including fasteners, hardware, and assembly components. The A210401000004 washer is an essential part of that ecosystem – and with Sinotruk’s original quality, you can be confident that every bolted joint will maintain its integrity.
Installation Best Practices for the A210401000004
Proper installation of the A210401000004 is straightforward but critical for achieving the correct clamp load. Always clean the bolt, nut, and joint surfaces to remove any dirt, oil, or debris before assembly. Place the washer on the bolt with the flat side facing the joint (or as per the original configuration). Apply a thin layer of thread lubricant to the bolt threads if specified, and tighten the nut or bolt to the manufacturer’s recommended torque using a calibrated torque wrench. For critical applications, it is advisable to torque in two stages (e.g., 60% then 100% of final torque) to allow for relaxation.
Regular inspection of the A210401000004 should be performed during routine service intervals. Check for signs of corrosion, deformation, or cracking. If any of these are observed, replace the washer immediately. Note that washers are typically not reusable once they have been torqued, as they may have experienced some embedment or deformation. Always use a new A210401000004 when reassembling a joint.
Built for Nigeria – Uncompromising Fastener Integrity in Every Environment
Nigeria’s roads and climate present a unique combination of challenges: high humidity, extreme heat, abrasive dust, and frequent vibration. The A210401000004 is engineered to withstand these conditions. Its corrosion-resistant coating protects against rust, even when exposed to moisture and road salts. Its hardened steel construction resists deformation, ensuring that the washer maintains its thickness and bearing area under the cyclic loads experienced on Nigeria’s often uneven surfaces.
Furthermore, the washer’s precise flatness ensures that the clamp load is evenly distributed, reducing the risk of stress concentrations that can lead to fatigue cracking of the bolted components. By choosing the genuine Sinotruk A210401000004, fleet operators can minimize the risk of fastener loosening and the associated downtime and repair costs.
Secure Every Joint with the Genuine A210401000004 Washer
The A210401000004 Washer may be small, but its role in maintaining bolted joint integrity is immense. Its precise dimensions, superior material quality, and OEM fitment make it the only choice for professional workshops and fleet maintenance. Every time you install a genuine Sinotruk A210401000004, you are ensuring that your truck’s critical assemblies remain secure, reducing the risk of unexpected breakdowns and extending the life of your equipment.
Never reuse or substitute generic washers for this critical component. Insist on the genuine A210401000004 – the washer trusted by experienced mechanics and fleet operators across Nigeria. With its proven performance in the most demanding applications, this washer delivers the reliability and peace of mind you deserve.
Genuine Sinotruk A210401000004 – Engineered for excellence. Built for Africa. Trusted by professionals.
Packaging & Shipping
Every Howo part is carefully packaged and shipped to ensure it arrives in perfect condition, ready for installation. Our professional logistics process guarantees timely delivery across Nigeria.
Secure Packaging
Each Howo part is individually wrapped in protective materials and placed in reinforced cardboard boxes to prevent damage during transit.
Dedicated Transport
We use our own Sinotruk logistics fleet for reliable delivery, ensuring parts reach customers quickly and safely across all regions of Nigeria.
Quality Inspection
Before shipping, each part undergoes final quality checks and is clearly labeled with its OEM number for easy identification.
Nationwide Distribution
Our extensive distribution network covers all major cities and rural areas in Nigeria, ensuring prompt delivery to construction sites, workshops, and businesses.
Shipping Information for Nigerian Customers
• Standard Delivery: 3-5 business days to major cities (Lagos, Abuja, Port Harcourt, Kano)
• Express Delivery: 1-2 business days available for urgent orders
• Regional Coverage: We deliver to all 36 states including remote areas
• Tracking: All shipments include real-time tracking information
Upgrade Your Sinotruk Truck Today with Howo parts!
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