Truck Bolt DXTB184 For HOWO

Truck bolts are generally sturdier than standard bolts, with a wide range of sizes from M10 to M30 and even larger, and lengths varying from several tens of millimeters to several hundred millimeters to meet the connection requirements of different components such as the frame, suspension, engine, transmission, and wheel hubs. Their heads are clearly marked, often bearing performance grade indicators such as 8.8, 10.9, or 12.9, which directly represent the bolt's strength. High-grade bolts are standard for trucks, as they must withstand the continuous impact and severe vibrations caused by the vehicle's weight, cargo load, and road bumps.
Materials and processes serve as the foundation of bolt strength. They are typically made from high-quality alloy steel, which undergoes quenching and tempering treatments to achieve exceptionally high tensile and yield strengths while maintaining a certain level of toughness to prevent brittle fractures. Surface treatments are also crucial, with common methods such as galvanization, Dacro coating, or phosphating. These treatments not only serve to prevent rust and protect against corrosion from rain, wind, and de-icing agents but also help stabilize the friction coefficient, ensuring precise preload is achieved during tightening.

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