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The 20*210 is a precision-engineered, high-strength metric bolt designed as a genuine OEM fastener for critical assembly points on BEIBEN trucks. This specific bolt, with a diameter of 20mm and a length of 210mm, is manufactured to meet rigorous automotive standards for clamping force, tensile strength, and vibration resistance. As a fundamental component among reliable Beiben truck parts, the 20*210 bolt is essential for securing high-stress components such as suspension brackets, engine mounts, frame crossmembers, and axle connections.
< p>Its failure can lead to catastrophic assembly loosening, component misalignment, or even structural separation. Using the correct genuine 20*210 bolt is therefore not a matter of convenience but a critical requirement for maintaining the vehicle’s structural integrity, safety, and operational reliability under extreme loads and constant vibration.
High-Strength Bolt
Высокопрочный болт
The bolt designated as 20*210 is a heavy-duty threaded fastener defined by its core dimensions: a 20-millimeter nominal diameter and a 210-millimeter length under the head. In BEIBEN truck applications, this is not a general-purpose bolt but a specifically engineered part for high-load connections. The “20*210” identifier ensures mechanics source the exact length and diameter required for the intended application, where thread engagement length and clamping range are critical design factors.
Using a bolt of incorrect length or strength can be dangerous. A bolt that is too short may not engage enough threads to hold securely, while one that is too long can bottom out or interfere with other components. More importantly, using a bolt of inferior material grade fails to provide the necessary clamp load, leading to joint loosening from vibration. The genuine 20*210 bolt is produced from the correct steel alloy and undergoes precise heat treatment to achieve its designated property class.
High Property Class: Typically graded as Class 10.9 or higher, indicating a minimum tensile strength of 1000 MPa and a yield strength of 900 MPa. This provides the high clamp force needed for critical joints.
Precision Threading: Features accurately rolled or cut metric threads (e.g., M20x2.5) that ensure smooth engagement with matching nuts or tapped holes, distributing load evenly across the threads.
Vibration Resistance: The combination of correct material, heat treatment, and proper installation torque allows the 20*210 bolt to resist loosening under the constant shock and vibration of truck operation.
Corrosion Protection: Often coated with a protective layer such as zinc plating, galvanization, or dichromate to prevent rust and seizing, ensuring the bolt can be removed during future service.
Consistent Dimensional Accuracy: Manufactured to tight tolerances on diameter, length, thread pitch, and head dimensions, guaranteeing a perfect fit in its designated location.
The engineering benefits are vital for safety. A correctly specified and torqued 20*210 bolt maintains a stable, rigid connection between components. This prevents fretting wear at mating surfaces, reduces stress concentrations, and ensures the overall assembly behaves as designed under load. For fleet maintenance, using the genuine fastener means predictable performance and reliability, eliminating joint failures that can cause costly downtime and safety incidents.
The table below outlines the primary technical specifications for the BEIBEN 20*210 High-Strength Bolt. These parameters are non-negotiable for correct application and safe operation.
| Specification | Detail |
|---|---|
| OEM Part Number / Size | 20*210 |
| Product Name | High-Strength Bolt |
| Brand | BEIBEN |
| Thread Specification | M20 x 2.5 (Typical Metric Coarse) |
| Strength Property Class | 10.9 or as Specified |
| Material | Medium Carbon Alloy Steel, Heat-Treated |
| Head Style | Hexagon (Hex Head) |
| Finish | Zinc Plated or Equivalent |
The M20x2.5 thread specification is standard for this diameter, balancing strength and ease of assembly. The Property Class 10.9 is a common grade for high-stress automotive applications. The hex head design allows for standard wrench or socket application with high torque capability. The specified finish is crucial for corrosion resistance in exposed underbody environments.
The 20*210 bolt is used in structurally significant locations on BEIBEN trucks. Common applications include securing the front and rear axle suspension brackets to the chassis frame, attaching the engine mounting brackets, fastening heavy crossmembers, and in some fifth-wheel mounting systems. Its length of 210mm is chosen to pass through multiple layers of frame rail and bracket material.
Compatibility is defined by the engineering drawing for each specific assembly. The 20*210 size is called out where its particular combination of diameter, strength, and length is required. It is not interchangeable with other bolts. Using a different bolt, even one with the same diameter but wrong length or strength class, compromises the joint design. Always replace with the identical 20*210 specification.
Creating Clamp Load: When torqued, the bolt elongates elastically, creating a powerful clamping force that presses the joined components together, creating friction that resists shear forces.
Shear Load Bearing: In many chassis applications, the bolt also acts as a pin, directly bearing transverse shear loads that try to slide the connected parts past each other.
Maintaining Joint Stiffness: A properly tightened joint is rigid. This stiffness is crucial for maintaining vehicle alignment (e.g., axle positioning) and ensuring predictable handling characteristics.
Safety-Critical Fastening: In events like heavy braking or impact, these high-strength bolts are the primary elements preventing the separation of major components, directly contributing to crashworthiness.
The 20*210 bolt is a key element in load path management. It ensures forces are transferred through the vehicle structure as intended by engineers. A failed bolt can redirect stresses in unpredictable ways, leading to cracks in frames or brackets. Its role is foundational to vehicle integrity.
Correct installation of the 20*210 bolt is paramount. Always clean the bolt threads and the mating threads in the nut or tapped hole. Apply an appropriate thread lubricant or anti-seize compound unless specified otherwise, as this drastically affects the achieved clamp load for a given torque. The bolt and nut (if used) should be of matching grade.
Torque must be applied using a calibrated torque wrench to the exact value specified in the BEIBEN service manual. This value is calculated based on the bolt’s grade and lubrication. For critical joints, a torque-to-yield or angle-tightening procedure may be required. Never reuse old bolts in critical suspension or engine mount applications; always install new 20*210 bolts.
Signs of a failing or inadequate bolt include visible looseness of the joint, which may cause knocking or clunking sounds over bumps. Elongation of the bolt hole in the bracket is a sure sign of movement and indicates the bolt was not providing sufficient clamp load.
Rust streaks emanating from under the bolt head or nut indicate tension and movement. In severe cases, the bolt may fracture, often at the thread run-out or under the head. Regular visual inspections during maintenance should check for these signs, especially after the vehicle has been in severe service.
Using the genuine 20*210 bolt is critical. OEM fasteners have guaranteed material properties and traceability. Their dimensions and thread form are perfect. Aftermarket bolts may claim the same size and grade but often have inconsistent heat treatment or inferior plating.
A bolt that yields prematurely or corrodes quickly jeopardizes the entire assembly. In structural and safety-related applications, the cost savings from a non-genuine fastener are insignificant compared to the risk of catastrophic failure. Genuine bolts ensure the joint performs as engineered.
The 20*210 High-Strength Bolt is a vital, safety-critical component in BEIBEN truck assembly. Its precise dimensions and high property class are essential for creating reliable, lasting joints in the chassis and drivetrain. Never underestimate the importance of this fundamental part.
Always replace with the genuine BEIBEN 20*210 specification, follow proper torque procedures with new fasteners, and inspect these critical joints regularly. This disciplined approach to fastening is a cornerstone of professional heavy-duty truck maintenance and safety assurance.
© 2023-2025 Truck Parts Guide. This content is for informational purposes. Always consult the official BEIBEN service manual and qualified professionals for all maintenance, repair, and safety-critical procedures.
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