Explore our high-durability cold-forged and precision-machined heavy anchors and bolts engineered to exceed international structural criteria.
In modern heavy civil engineering, skyscrapers, dynamic bridge structures, and high-load industrial installations, structural stability relies on critical connection points. As an industry-leading Hot Anchors manufacturer and factory in China, Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd. addresses the complexities of mechanical anchoring under dynamic stress, seismic tension, and corrosive environments.
Hot Anchors (encompassing heavy-duty wedge anchors, chemical anchor studs, and high-yield expansion anchors) act as critical connection nodes in reinforced concrete slabs, masonry walls, and structural steel framing. Our manufacturing methodologies combine cold forging precision, advanced metallurgical heat treatment, and superior surface treatments (such as hot-dip galvanization and advanced zinc-flake systems) to prevent structural failure due to wind shear, seismic displacement, and tensile fatigue.
Pioneering high-grade fastening engineering through rigorous quality management, integrated metallurgy, and advanced design principles.
Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd. was established in 2015. Located in Yongnian, the recognized fastener hub of China, we are an enterprise specializing in the production, engineering, and global export of high-grade industrial fasteners. Our company is committed to providing high-quality fastener products and providing customers with comprehensive solutions in various industries. As a reputable fastener manufacturer, we have advanced production equipment and a professional technical team to meet our customers' needs for different types of fasteners.
Over the past decade, we have expanded our research and development programs to match international design codes (including ASTM, DIN, ISO, and ETA standards). We don't just sell components; we engineer long-term load-bearing security. Our facility is equipped with automated multi-station cold formers, high-precision thread rolling machines, and an in-house heat treatment plant that guarantees consistent mechanical properties across every production run.
Our engineering division leverages state-of-the-art FEA (Finite Element Analysis) software to simulate stress concentrations and fatigue under tension and shear loads. This ensures our anchors maintain grip depth even in cracked concrete environments.
We source certified steel wire rods directly from national mills, including Q235B, Q355B, 35ACR, 45# Medium Carbon, and premium grade Stainless Steel 304 & 316, ensuring predictable yield-to-tensile ratios.
Our production floor operates round-the-clock with multi-die cold formers, vertical CNC threading centers, and automated optical sizing sorters that eliminate visual defects and dimension variances.
Understanding mechanical expansion, pull-out thresholds, shear resistance, and structural calculations according to global compliance rules.
Heavy-duty anchors rely on mechanical friction or positive mechanical interlock to transfer structural loads to concrete bases. Wedge anchors (also known as expansion bolts) feature an expansion clip that expands against the sides of the drilled hole when torque is applied. This expansion translates rotational torque into axial pre-tension. Under tension loads, the expansion cone is pulled further into the expansion clip, increasing lateral pressure and friction force against the concrete substrate.
Our technical design ensures that our wedge anchors minimize the required edge distance and spacing between adjacent anchors. The specialized geometries of the expansion collar ensure even stress distribution, reducing the risk of concrete cone blowout or concrete splitting, especially in cracked concrete sections subjected to seismic movements.
| Anchor Size (Metric) | Drill Bit Diameter (mm) | Min. Embedment Depth (mm) | Char. Tensile Load (kN) - C20/25 Concrete | Char. Shear Load (kN) - Carbon Steel | Recommended Installation Torque (Nm) |
|---|---|---|---|---|---|
| M8 | 8 | 45 | 8.5 | 7.2 | 20 |
| M10 | 10 | 60 | 12.6 | 11.4 | 45 |
| M12 | 12 | 70 | 17.2 | 16.8 | 70 |
| M16 | 16 | 90 | 25.8 | 31.0 | 120 |
| M20 | 20 | 115 | 36.4 | 48.5 | 200 |
From deep marine docks to seismic-heavy metropolitan projects, our fasteners are optimized for diverse global environments.
Coastal and offshore structures face constant threat from chloride-induced stress corrosion cracking (SCC). Our M8-M24 structural anchors are hot-dip galvanized (HDG) to ASTM A153 specifications or fabricated from 316/A4 grade stainless steel with high molybdenum content, providing over 1,000 hours of salt spray resistance (ASTM B117).
Vibrational loads from heavy industrial motors, stamps, and high-speed cranes trigger mechanical fatigue in anchoring studs. Dongshuo's high-tensile anchors utilize specialized thread-locking geometries and custom carbon alloys to absorb fatigue without compromising clamp load.
For high-rise structures in seismic zones (Categories C to F), our heavy-duty sleeve anchors and wedge anchors are designed to resist tension and shear forces under cracked concrete conditions, satisfying international seismic building codes.
As a progressive manufacturer, Handan Dongshuo is actively implementing a 3-year technological advancement plan focusing on smart monitoring and eco-friendly coatings:
Leveraging geographical clustering and optimized manufacturing networks to deliver cost advantages and secure international logistics.
Our production facilities are situated in the Yongnian District of Handan, Hebei Province—famously known as the "Fastener Capital of China". This industrial clustering offers unique advantages for global buyers:
Standard and bespoke components manufactured to meet exacting global industrial and structural regulations.
In the fierce market competition environment, we always adhere to the customer-centered concept. In order to meet the needs of our customers, we provide customized solutions and are able to deliver on time. We have established long-term cooperative relationships with our customers and have received high praise from them.
As a reputable fastener manufacturer, we have advanced production equipment and a professional technical team to meet our customers' needs for different types of fasteners. Our cold-forging and thread-rolling systems ensure thread dimensional accuracy within micron limits, complying with major structural engineering codes.
At the same time, we also pay attention to environmental protection and sustainable development. We use green and environmentally friendly materials and production processes to contribute to society and the environment. We minimize toxic runoffs through closed-loop water treatment in electroplating facilities.
Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd. always adheres to the business philosophy of "quality first, customer first" and strives to provide customers with the best fastener solutions. Each production batch undergoes strict tensile testing, salt-spray verification, and visual inspections.
Alongside our main structural anchors, we provide custom packaging design, customized labeling, and retail-ready kits for global distribution.
Technical guidance and installation recommendations from our senior engineering team.
Dongshuo Fastener