Professional Supplier of Shear-shear High-strength Bolts. One-stop Solution for Fastening in Steel Structure Engineering.

Professional Supplier of Shear-shear High-strength Bolts. One-stop Solution for Fastening in Steel Structure Engineering.

We have been deeply engaged in the industrial fastener industry for many years, focusing on the research, production and full-chain supply of special torsion-shear high-strength bolts for steel structures. We provide complete, high-performance, compliant with national standards and industry standards, torsion-shear bolts, matching nuts and washers. We offer safe, reliable, precise and efficient, and adaptable to complex working conditions fastening connection solutions for multiple fields such as steel structure buildings, bridge engineering, power infrastructure, heavy machinery, and venue construction. We achieve one-stop purchasing of industrial fasteners and full-cycle technical services.

Core product: Torsion-shear high-strength bolts. Full range of specifications available.

As our core flagship product, the twisted and shear type high-strength bolts (also known as steel structure twisted and shear bolts, or 10.9 grade high-strength twisted and shear bolts) is a key fastening component in the field of steel structure engineering. The product strictly follows the national standard GB/T 3632, covering all specifications, multiple materials, and various surface treatment options, and can meet the differentiated needs of different engineering scenarios.

Product core parameters and features

Strength grade: The main product features a 10.9 grade high-strength specification, with extremely high tensile strength, anti-slip coefficient and fatigue resistance. It can withstand the high load requirements of heavy steel structures and is the preferred product for large-span and high-load steel structure connections.

Complete configuration: Each set of products includes the main body of the shear-tight bolt, matching high-strength nuts and flat washers, achieving complete supply without the need for customers to make separate selections, ensuring assembly compatibility and tightness consistency.

Material and surface treatment: The core material is high-quality carbon steel and alloy steel, and various surface treatment processes such as blackening, phosphating, hot-dip galvanizing, and Dacromet coating can be provided, suitable for common indoor conditions, outdoor high humidity, coastal high salt spray, and high cold and high temperature environments, with excellent anti-corrosion and rust prevention properties.

Specification coverage: Standard M16, M20, M22, M24, M27, M30 specifications are always in stock, and non-standard sizes can be customized according to customer requirements to meet the customized needs of special projects.

Core advantages of the product

The torsion-shear design inherently possesses precise torque control capabilities. During installation, by using a special wrench to unscrew the torx head at the end of the bolt， the designed pre-tightening force can be precisely achieved without the need for manual torque calibration. This completely resolves the industry pain points of inaccurate torque control and uneven pre-tightening force in traditional large hexagonal bolts， significantly enhancing the efficiency and connection safety of steel structure installation. It is currently the mainstream preferred fastening product in the domestic steel structure engineering field.

Strong technical capabilities have enabled the product to achieve outstanding performance.

We take technology as the core driving force and establish a full-process autonomous production system. From raw material smelting, forming processing to finished product handling, we fully control the core processes to ensure the stable performance and controllable quality of each batch of products.

Core production technology

• Precision hot forging / cold forging forming process: Utilizing fully automated multi-station forming equipment to achieve integral forging of bolts, ensuring uniform metallographic structure and no internal stress defects, thereby enhancing the fatigue and impact resistance of the products from the source.

• Precise heat treatment quenching and tempering technology: Employing a controllable mesh belt furnace heat treatment production line to precisely control the quenching and tempering parameters, ensuring that the hardness, tensile strength, elongation and other core mechanical properties of 10.9 grade high-strength bolts fully meet the requirements of national standards, with batch performance consistency reaching over 99%.

• High-precision thread rolling technology: Utilizing imported thread rolling equipment, achieving high precision in thread formation and excellent surface finish, effectively enhancing the meshing degree and anti-slip performance of the threads, ensuring smooth assembly process and uniform preload force transmission.

• Environmentally friendly anti-corrosion surface treatment technology: Offering various surface treatment options such as blackening, phosphating, hot-dip galvanizing, and electroless nickel plating. The coatings have strong adhesion and excellent corrosion resistance. Among them, the electroless nickel plating process can ensure no rust after 1000 hours of salt spray tests, perfectly suitable for high-corrosion environments such as outdoor, coastal, and chemical industries.

• Friction coefficient stable control technology: Through refined process control, achieving precise control of product friction coefficient, ensuring extremely low torque coefficient dispersion rate for the same batch of products, completely solving the problem of uneven preload force during installation, and guaranteeing the overall safety of steel structure connections.

Core performance highlights

The product features high load-bearing capacity, excellent anti-loosening and shock resistance performance, stable mechanical properties, outstanding corrosion resistance, and can operate stably in a wide temperature range of -40℃ to 150℃. It is suitable for various complex working conditions such as high cold, high heat, high humidity, and high vibration, and fully meets the fastening requirements of various heavy steel structure projects.

Full industry compatibility - Multi-scenario fastening solution implementation completed

Our twist shear high-strength bolts have achieved wide application in several key industrial and infrastructure sectors due to their stable quality and comprehensive services, providing reliable fastening and support for various major projects.

Core covered industries

• Steel structure construction industry: Mainframe connections for super high-rise office buildings, commercial complexes, industrial plants, and warehousing and logistics parks

• Bridge and rail transit industry: Long-span highway bridges, railway bridge steel box girders connections, and steel structure construction of rail transit stations

• Energy and power industry: Wind turbine tower fastening, power towers erection, photovoltaic support steel structures, and steel structure projects for thermal power plants

• Public venue construction: Sports venues, convention centers, airport terminal buildings, high-speed railway station buildings, etc., large-span grid and shell steel structure connections

• Heavy machinery industry: Heavy machine tools, mining machinery, lifting equipment, etc., steel frame connections for heavy equipment

  

Typical application scenarios

Whether it is the core tube steel structure connection of super high-rise buildings, the steel box girder tightening of large-span bridges, or the high-vibration condition tightening of wind turbine towers, as well as the installation of grid structures in large venues, our products can provide precise and adaptable solutions to ensure the long-term safety and stability of the engineering structure. At the same time, they can significantly improve the on-site installation efficiency and reduce the time and labor costs of the project construction.

Full-process quality control; authoritative certification for quality assurance

We always regard product quality as the lifeline of our enterprise development. We have established a complete quality control system covering the entire process from raw material entry to product manufacturing and final delivery. Every product undergoes multiple rigorous tests to ensure that the ones delivered to customers are defect-free and of high performance.

Full-process quality control

• Raw material inspection upon entry to the factory: All raw materials are sourced from large and high-quality domestic steel mills. Upon entry, spectral material analysis and initial mechanical performance checks are conducted to prevent any unqualified materials from entering the production process.

• Production process inspection: The entire production process implements the first-piece inspection, patrol inspection, and batch sampling inspection systems. Real-time monitoring is carried out on core parameters such as forming dimensions, thread accuracy, and heat treatment hardness to ensure zero deviations in the production process.

• Finished product inspection upon departure: Before the finished products leave the factory, all items are subject to comprehensive performance tests including tensile strength, yield strength, torque coefficient, hardness, and impact energy. At the same time, full inspections of appearance and dimensional accuracy are also conducted. Only products that fully meet national standards can be released from the factory.

Authoritative certification and standard compliance

The enterprise has obtained the ISO 9001 international quality management system certification. The products strictly comply with the national standard GB/T 3632 "High-strength Torque-Clip Connecting Bolts for Steel Structures". At the same time, they can be produced in accordance with international standards such as DIN and ANSI. Each batch of products can provide complete material reports and performance test reports, enabling full traceability throughout the product's life cycle. This ensures that customers can purchase with confidence and use with peace of mind.

Personalized customization service and full-cycle technical support

We are well aware that the tightening requirements for different projects and different working conditions vary. Therefore, we have established a comprehensive customized service system, covering from selection design to after-sales support, to provide customers with a full-cycle, one-on-one exclusive service.

Customized product solution

Customization of non-standard size specifications: For special installation spaces and specific force requirements, custom non-standard threaded specifications, lengths, and head types for shear-bolt products

Material and performance customization: For special working conditions such as high temperature resistance, low temperature resistance, corrosion resistance, and radiation protection, customize high-strength bolts made of special materials such as stainless steel, alloy steel, and special steel

Surface treatment customization: Based on the usage environment, customize different anti-corrosion treatment schemes such as hot-dip galvanizing, Dacromet coating, and Teflon according to the requirements

Full-cycle technical support

Pre-selection guidance: Based on the steel structure design parameters, load requirements, and working conditions of the project, provide professional suggestions on bolt specifications, strength grades, and material selection.

Technical scheme design: For complex engineering projects, offer exclusive overall solutions for fastening connections, including torque parameter suggestions and assembly process guidance.

After-sales technical service: Provide on-site installation technical guidance and rapid response handling of issues to ensure the smooth progress of project construction.

In addition, we offer a one-stop procurement service. Besides the core twist-shear high-strength bolts, we can also supply a full range of industrial fasteners such as large hexagonal high-strength bolts, self-tapping screws, locking nuts, and flange nuts. This meets the one-stop procurement needs of customers and reduces procurement management costs.

Core competitive advantage: Create long-term value for customers

With years of in-depth industry experience, we have achieved recognition and trust from numerous customers through our excellent product quality, comprehensive service system and efficient supply capabilities. As a result, we have become long-term and stable partners for many domestic steel structure engineering enterprises and infrastructure units.

• Reliable fastening and safety guarantee: 10.9 grade high-strength performance, precise preload control, excellent fatigue resistance and anti-slip performance, which can ensure the long-term safe and stable operation of steel structure projects for several decades, significantly reducing the maintenance costs and safety risks in the later stage.

• Efficient installation, cost reduction and efficiency improvement: The torsion-shear design enables "conforming upon twisting", eliminating the need for complex torque calibration, significantly reducing the technical threshold and labor costs for on-site installation. Compared to traditional bolts, the installation efficiency can be increased by more than 30%, effectively shortening the project construction period.

• Comprehensive specifications, stable supply: Regular specifications are always in stock with a ten-thousand-ton capacity, enabling same-day orders and same-day shipments, meeting the urgent supply needs of projects; our own large-scale production base can handle large quantities and customized orders, ensuring the stable supply cycle and batch quality of major projects.

• Comprehensive services, worry-free: From the early stage of selection, scheme design, to production delivery and on-site technical support, a one-on-one dedicated customer manager provides full follow-up, responding quickly to customer needs, completely solving various pain points in the procurement and use process.

Benchmark project case - Customers' firsthand testimony

Over the years, our products have been successfully applied to hundreds of major projects across the country, covering areas such as super high-rise buildings, large bridges, sports venues, and wind power bases. With stable quality and excellent services, we have received widespread praise from customers.

• Large-scale commercial complex steel structure project: For a 300-meter super-tall commercial complex project in a provincial capital city, we provided a full range of torsion-shear high-strength bolt products. The cumulative supply exceeded 500,000 sets. The performance of the product batches was stable, fully meeting the project design requirements. This helped the project complete the steel structure main structure topping out ahead of schedule and received unanimous recognition from the construction unit and the client.

• Large-span cross-river bridge project: For a provincial key cross-river bridge project, we customized and supplied high-corrosion-resistant Dacromet process torsion-shear high-strength bolts. The product passed a 1,500-hour salt spray test and perfectly adapted to the complex conditions of high humidity and high salt spray on the bridge's outdoor environment, ensuring the long-term safety of the bridge's steel structure connections.

• Large-scale wind power base project: For a large-scale wind power base in the northwest region, we supplied wind turbine tower specific high-strength torsion-shear bolts in batches. The product has excellent anti-vibration and low-temperature performance， and can be adapted to extreme conditions such as high coldness， strong wind， and high vibration in the Gobi Desert. The cumulative supply exceeded 1 million sets， with zero quality feedback.

  

  The product performance is stable, the supply is timely, and the technical service response is fast. They are a reliable supplier for our long-term steel structure engineering cooperation." "The installation of torsion-bending bolts is convenient, the pre-tightening force is precise, which significantly improves our on-site construction efficiency and reduces construction costs." The genuine evaluations from numerous cooperative customers are the core driving force for us to continuously enhance product quality and service capabilities.

Get customized fastening solutions for free

Whether you are a construction unit for steel structure projects, the client of infrastructure projects, or a manufacturer of heavy machinery, as long as you have requirements for purchasing and technical aspects of high-strength fasteners, you can contact us at any time.

You only need to provide the core information such as the specification and model of the bolts, the strength grade, the purchase quantity, and the operating conditions. Then we can offer you the service:

✅One-on-one personalized selection guidance and product quotation

✅ Free customized fastening connection solutions

✅ Free sample testing and comprehensive inspection report

✅ Full-cycle technical support and after-sales guarantee

You are welcome to contact us via phone, email or online form. We will respond to your needs immediately and provide you with high-quality, cost-effective and reliable industrial fastening components and services. Let's work together to create excellent engineering projects.