As a manufacturer specialising in high-strength fasteners, we have eliminated the mark-ups associated with intermediaries. With military-grade quality and a fully controlled production system, we provide safe, reliable and cost-effective core fastening solutions for a wide range of major engineering projects and heavy-duty equipment.
10.9S high-strength large hex head structural bolts, Positioned as a ‘core component for primary load-bearing connections in steel structures’, these bolts are characterised by their high strength, high toughness and high stability. By applying significant preload, they utilise the friction between connecting elements to transmit shear and tensile forces. Suitable for applications demanding extremely high connection strength and reliability, their load-bearing capacity far exceeds that of standard Grade 4.8 and Grade 8.8 bolts, making them an indispensable key fastener in industrial steel structures, bridge engineering and heavy machinery.

High strength and toughness, stable load-bearing capacity, suitable for extreme operating conditions

Manufactured from premium alloy steel raw materials and subjected to professional tempering heat treatment (quenching + high-temperature tempering), with certain products undergoing cryogenic treatment (-196°C for 8 hours) to refine grain size. This results in a 50% increase in fatigue life compared to conventional products, combining high strength with high toughness to withstand immense impact loads and shear forces without fracturing or deforming. Whether in the context of bridge engineering facing severe typhoons and high-salinity environments, the high-frequency vibrations of heavy machinery, or the long-term load-bearing demands of high-rise buildings, these components reliably perform their connecting function, ensuring structural safety. Their service life far exceeds the industry average, thereby reducing long-term maintenance costs.

Outstanding precision, easy installation, and enhanced construction efficiency

We operate our own modern production facilities, equipped with dozens of specialist machines including fully automatic CNC thread rolling machines and welding robots. Utilising advanced hot-forging and high-precision rolling processes, we strictly control thread accuracy, head shape and dimensional tolerances, ensuring high product interchangeability and allowing for direct installation without the need for additional grinding. The large hexagonal head design is compatible with all standard construction tools. The tightening speed of the nut can be controlled to within 5 rpm, ensuring a consistent speed that minimises the impact of frictional heat on the torque coefficient. This enables rapid assembly and precise fastening, significantly improving construction efficiency. It is particularly suitable for high-volume, high-intensity construction scenarios, thereby reducing labour costs.

Suitable for a wide range of applications, with flexible customisation to meet individual requirements

Suitable for a wide range of applications, covering industrial steel structures (factory steel beams, warehouse shelving), bridge engineering (steel box girder splicing, column connections), high-rise buildings (reined concrete columns, core walls), heavy machinery (forging and pressing machines, mining crushers), aviation infrastructure (large-span space frames for aircraft hangars), and new energy (wind turbine towers, photovoltaic power plants), among other sectors, meeting connection requirements across diverse operating conditions. With a dedicated team specialising in technical R&D and prototyping, we can swiftly optimise drawings, produce samples and undertake mass production of non-standard specifications, special materials and products requiring specialised processes, based on client-provided construction drawings and specific operational conditions. Our customisation lead times are significantly shorter than the industry average, catering to a wide range of non-standard engineering requirements.