Premium Black-Oxidized High-Strength Hex Bolts: Engineered for Excellence

In the world of industrial fasteners, strength, durability, and reliability are non-negotiable. For projects demanding exceptional performance, our Black-Oxidized Class 8.8, 10.9, and 12.9 High-Strength Hex Head Bolts stand as the definitive solution. Manufactured by Aixin, these bolts are engineered to meet and exceed rigorous standards, offering unparalleled quality for a wide range of professional and industrial applications.

These bolts are crafted from premium 35K material, a specification chosen for its excellent balance of strength and toughness. The material forms the foundation for achieving the superior Property Class A grading, ensuring consistent performance and a high load-bearing capacity. This makes them ideal for critical structural connections, machinery assembly, automotive applications, and heavy-duty construction where failure is not an option.

Adherence to international standards is paramount. Our bolts are manufactured in strict compliance with the GB/T 5782-2016 standard, which governs the dimensions, technical requirements, and testing methods for hexagon head bolts. This guarantees precise threading, accurate head dimensions, and reliable mechanical properties, ensuring perfect compatibility and fit in your assemblies.

The black oxide coating is not merely for aesthetics; it provides a crucial layer of corrosion resistance. This finish helps protect the bolts from rust and oxidation in various environments, extending their service life while maintaining a professional, low-glare appearance. Available in multiple high-strength grades—8.8, 10.9, and 12.9—you can select the perfect bolt tailored to the specific tensile and yield strength requirements of your project. From general-purpose use (8.8) to the most demanding high-stress applications (12.9), we have you covered.

We understand that every project is unique, which is why we offer comprehensive specifications. Our inventory is extensive, and to ensure you receive the most accurate pricing and availability for your required diameter, length, and grade, we encourage you to contact our customer service team for a quote. As a manufacturer supplying directly, we provide competitive pricing without compromising on the quality that the Aixin brand represents.

Whether your application is in construction, manufacturing, automotive repair, or DIY projects requiring industrial-grade hardware, these high-strength hex bolts are designed to be the reliable cornerstone of your work. Choose Aixin for fasteners that combine superior materials, precise manufacturing, and protective finishing.

Standard Use. Superior Strength. Direct Supply. Upgrade your components with our premium black-oxidized hex bolts. For pricing on specific models and bulk order inquiries, please reach out to our客服 team today to secure your supply of these high-performance fasteners.