10.9 Grade Hex Head Bolts

　　This product is a core fastener for steel-concrete composite structures, also known as shear studs. It is a special welding component used for connecting steel crane beams, floor slabs, and concrete in steel structures. The studs are fixed to the steel beam by welding, and then concrete is poured. The studs and concrete form a strong shear key, effectively transferring shear force, preventing separation of steel and concrete, and improving the overall structural performance of the composite structure. The product is manufactured strictly in accordance with ISO13918/GB10433 standards. The welding end is reasonably designed, the arc is stable, and the weld is aesthetically pleasing and highly durable. It is an essential component for heavy steel structure factories and high-rise building steel-concrete floor slabs, and a core product for traders serving high-end engineering projects.
　　Core Parameters: Material: Carbon steel ML15Al; Surface treatment: Hot-dip galvanizing; Specifications: M16 M19 M22 (regular stock); Executive standard: ISO13918/GB10433
Recommended Accessories: Matching ceramic rings (for stud welding) are recommended to protect the welding core during welding and improve welding quality.

　　This product is the “exclusive welding accessory” for cylindrical head welding studs and is an essential component for welding steel-concrete composite structures. Made of high-temperature resistant ceramic material, it precisely fits various stud specifications. During welding, the ceramic ring is placed on the welding end of the stud, effectively isolating air and preventing oxidation of the weld core at high temperatures. It also stabilizes the arc, ensuring even distribution of welding current, resulting in a full and aesthetically pleasing weld bead after welding. This significantly improves the strength and success rate of the weld. Welding without a ceramic ring can lead to problems such as weld core oxidation, incomplete welds, and uneven weld beads, posing a safety hazard in steel-concrete composite structures. Therefore, the ceramic ring is an essential accessory for welding studs. We have ample stock and it is compatible with all standard stud specifications.
　　Core Parameters: Material: High-temperature resistant ceramic; Specifications: Compatible with M16, M19, and M22 welding studs; Executive Standards: ISO13918/GB10433
Recommended Matching: Use with corresponding specifications of cylindrical head welding studs for complete welding.

　　This product is a core fastener specifically designed for the main frame of steel structures. It features a 10.9S ultra-high strength grade and is manufactured strictly in accordance with national standards GB1228-1231. It is the core connecting bolt for main load-bearing components such as steel columns, steel beams, and steel trusses. The product is meticulously manufactured through multiple processes including cold heading, heat treatment, thread rolling, flaw detection, and anti-corrosion treatment. Each batch undergoes tensile strength, hardness, and torque coefficient testing, and defective products are strictly prohibited from leaving the factory. The bolt head and shank are firmly connected, and the threads are free of burrs and stripped threads. After installation, the load is evenly distributed, effectively resisting wind vibration, earthquakes, and vertical loads in high-rise buildings and large-span factories, making it a core guarantee for the safety of steel structure projects.

　　This product is a high-strength shear bolt specifically designed for steel structure main frames, strictly manufactured in accordance with the national standard GB3632. It is a highly efficient fastener that replaces large hexagonal bolts. Its core advantages are “precise installation and no need for re-inspection.” The bolt features a spline head at the tail, which is tightened using a special shear wrench. When the bolt’s pretension reaches the design value, the spline head automatically shears off, indicating successful installation. This eliminates the need for torque testing, significantly saving construction time and labor costs. The product is suitable for high-strength connections in steel structure main frames, providing even stress distribution, secure connection, and resistance to vibration and loosening. It is the preferred bolt for large-span factories, high-rise buildings, bridges, and other steel structure projects. It boasts stable quality, complete test reports, and compliance with relevant standards.