10.9 grade structural bolt is made of alloy steel with quenching and tempering heat treatment, designed specifically for steel structure connection. It features outstanding tensile strength, yield strength and fatigue resistance, which can bear heavy static and dynamic loads for long-term service.

Strictly produced in accordance with standard specifications for construction engineering. The complete set includes bolt, nut and matching washer, which ensures uniform bearing force and stable locking effect to prevent loosening under vibration. Available surface finishes include hot-dip galvanized and phosphating to meet anti-corrosion demands for outdoor building projects. Widely applied in factory steel frames, bridge engineering, high-rise buildings and large-scale construction projects.