Genuine Sinotruk Nut M20 805-300-112 – Uncompromising Fastening Security for Howo Heavy-Duty Chassis & Driveline
Heavy-Duty Hex Nut for Critical Bolted Joints
The Sinotruk Nut M20 805-300-112 is a genuine OEM high-strength hexagon nut engineered to provide secure, reliable fastening in Howo and Sinotruk heavy-duty trucks. As an integral component of every critical bolted connection, the 805-300-112 ensures consistent clamping force, excellent resistance to loosening, and superior load distribution – all essential for maintaining vehicle integrity under the extreme vibrations and dynamic stresses of Nigerian roads.
This 805-300-112 nut is manufactured from high-grade alloy steel, heat-treated to property class 10, and coated with a durable zinc-nickel layer for outstanding corrosion protection. Its precision-formed threads and controlled bearing face guarantee a perfect fit with M20 bolts, providing reliable torque retention and repeated reusability. Trust the genuine Sinotruk 805-300-112 to safeguard your vehicle’s most critical joints against loosening and failure.
Nut M20
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Гайка M20
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Engineering Excellence Behind the 805-300-112 Nut M20
The 805-300-112 is far more than a simple hex nut – it is a precision-engineered fastener that plays a vital role in the safety and longevity of your vehicle. Manufactured from a chromium-molybdenum alloy steel (42CrMo4), it undergoes controlled quenching and tempering to achieve a tensile strength of ≥ 1040 MPa and a yield strength of ≥ 940 MPa, meeting the stringent requirements of property class 10. Its threads are formed by a precision tapping process that ensures consistent pitch diameter and flank angle, providing reliable engagement with mating bolts.
The zinc-nickel coating on the 805-300-112 offers exceptional protection against corrosion, significantly outperforming standard zinc plating. This is especially critical in Nigeria’s coastal and high-humidity regions, where salt-laden air and road spray can rapidly degrade unprotected fasteners. The coating also provides a stable friction coefficient, which is essential for achieving accurate and repeatable torque-tension relationships during assembly.
In typical Howo truck applications, the 805-300-112 is used with M20 bolts in locations such as axle U-bolt plates, suspension spring hangers, engine mounting brackets, and cross-member connections. Its 30mm across-flats hexagon design provides ample wrenching surface, allowing for high tightening torques without rounding the corners. The bearing face is flat and perpendicular to the thread axis, ensuring even load distribution and minimizing the risk of embedding into the joint surface.
Technical Specifications – Nut M20 805-300-112
| Parameter | Specification |
|---|---|
| OEM Part Number | 805-300-112 |
| Product Name | Nut M20 (Hexagon nut, coarse thread) |
| Brand | Sinotruk (Genuine OEM) |
| Thread Size | M20 x 2.5 (coarse) |
| Width Across Flats | 30 mm |
| Height (Thickness) | 18 mm |
| Material | Alloy steel (42CrMo4) |
| Property Class | 10 (high-strength) |
| Tensile Strength | ≥ 1040 MPa |
| Yield Strength | ≥ 940 MPa |
| Coating | Zinc-nickel (yellow passivation) |
| Corrosion Resistance | ≥ 720 hours salt spray (ISO 9227) |
| Thread Form | Tapped, ISO metric |
| Application | Axles, suspensions, engine mounts, frame connections |
| Compatible Models | Howo A7, T7, C7H, HW series; Sinotruk heavy-duty trucks |
Why the Genuine Sinotruk 805-300-112 Outperforms Generic Nuts
Generic nuts are often made from lower-grade steel with inconsistent heat treatment, leading to premature thread stripping or galling under high torque. The 805-300-112, with its controlled alloy composition and precise heat treatment, delivers consistent hardness and ductility, ensuring reliable thread engagement and resistance to seizing. Its zinc-nickel coating also provides significantly better corrosion protection than plain zinc plating, which is essential for long-term service in harsh environments.
Additionally, the precise dimensional control of the 805-300-112 ensures that it meets the required proof load and thread fit specifications. Generic nuts often have excessive thread clearance or out-of-tolerance hexagon dimensions, which can lead to uneven loading, reduced clamp force, and increased risk of loosening. With the genuine Sinotruk 805-300-112, you can be confident of a perfect match with your M20 bolts.
Advanced Material Science for Long-Term Reliability
The 42CrMo4 alloy used in the 805-300-112 provides excellent strength and toughness, even at low temperatures. Its fine-grained microstructure, achieved through precise heat treatment, offers high resistance to stress-corrosion cracking and hydrogen embrittlement – common failure modes in high-strength fasteners. This makes the 805-300-112 particularly suitable for Nigeria’s varied climate, from humid coastal regions to the dry interior.
Compatibility and Fitment
The 805-300-112 is a direct replacement for the original nut in a wide range of Sinotruk and Howo models. Its M20x2.5 coarse threads are standard for most heavy-duty chassis applications. Always verify that the nut’s property class (10) matches the bolt grade (typically 10.9 or 12.9) for optimal joint performance, and use a calibrated torque wrench to tighten to the specified torque for your specific application.
Explore the full range of genuine Howo Parts available for your fleet, including fasteners, suspension components, and chassis hardware. The 805-300-112 nut is an essential part of that ecosystem – and with Sinotruk’s original quality, you can be confident that every critical joint will remain securely fastened.
Installation Best Practices for the 805-300-112
Proper installation of the 805-300-112 is essential to achieve the correct clamp load and prevent joint loosening. Always clean the bolt and nut threads of any dirt, oil, or debris before assembly. Apply a thin film of engine oil or thread lubricant to the bolt threads and the bearing face of the nut to achieve accurate torque readings. Use a torque wrench calibrated to the recommended torque for the specific bolt grade and application, and tighten the nut in a cross-pattern if multiple fasteners are used.
Regular inspection of the 805-300-112 should be part of your vehicle’s service schedule. Check for any signs of loosening, corrosion, or thread damage. If a nut is removed, it should be replaced with a new 805-300-112 to ensure consistent clamp force, as the threads may have been stressed or the coating compromised during previous use.
Built for Nigeria – Secure Fastening in Demanding Environments
Nigeria’s heavy-duty trucking industry operates under some of the most challenging conditions in the world: extreme heat, high humidity, abrasive dust, and constant vibration from unpaved roads. The 805-300-112 is engineered to withstand these challenges. Its high-strength alloy and corrosion-resistant coating ensure that it maintains its clamping force and thread integrity, even after years of exposure to the elements.
Furthermore, the nut’s precise geometry and robust design prevent loosening due to vibration – a common issue with generic fasteners that can lead to catastrophic component failure. By choosing the genuine Sinotruk 805-300-112, fleet operators can reduce the risk of unexpected breakdowns and extend the service life of critical chassis and powertrain components.
Secure Your Vehicle with the Genuine 805-300-112 Nut M20
The 805-300-112 Nut M20 is a small but essential component that ensures the structural integrity of your Howo or Sinotruk truck. Its superior strength, corrosion resistance, and exact OEM fitment make it the only choice for professional workshops and fleet managers. Every time you install a genuine Sinotruk 805-300-112, you are guaranteeing safe and reliable operation, reducing downtime, and protecting your investment.
Don’t compromise with generic nuts that may not meet the required strength or durability standards. Insist on the genuine 805-300-112 – the nut trusted by experienced mechanics and fleet operators across Nigeria. With its proven performance in heavy-duty applications, this nut delivers the security and peace of mind you deserve.
Genuine Sinotruk 805-300-112 – 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
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