Precision-engineered standard and customized industrial fasteners built to surpass ISO, DIN, and ASTM mechanical specifications.
In high-stakes industrial assembly, headed screws are not simple components—they are crucial mechanical links calculated to withstand complex multi-axial fatigue loads. As a leading manufacturer, Dongshuo Fastener systematically investigates mechanical behavior, material metallurgy, and corrosion-prevention technologies to produce high-performance industrial fasteners.
Headed screws are designed to convert torque into clamping force. The geometry of the head—whether hexagonal, countersunk, socket, or flanged—directly dictates the surface pressure distribution and structural integrity of the joint. When applied to high-torque structural steel connections, optimized headed designs eliminate the risk of stress concentration and subsequent thread stripping under dynamic loads.
Engineered using premium medium carbon steel and chromium-alloyed steel. Heat treated to achieve tensile strengths exceeding 1200 MPa.
Proprietary hot-dip galvanizing, color zinc plating, and black oxide treatments designed for C3 to C5 corrosive environments.
Established in 2015, Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd. has developed into a major provider of standard and customized high-strength industrial fasteners. Situated in the heart of China’s fastener manufacturing base in Yongnian District, Handan, we leverage advanced machinery, strict quality inspection, and deep technical expertise to deliver structural solutions to customers worldwide.
Our commitment goes beyond simple manufacturing; we provide end-to-end support that covers product design, custom engineering, and final manufacturing stages. This integrated approach ensures that every batch of fasteners we ship maintains strict tolerance controls and material properties, meeting the high standards required by industrial projects.
CAD modeling and structural analysis to optimize fastener geometry and thread profiles for specific structural applications.
Precision selection of raw material grades, cold forging profiles, and heat-treatment specifications for heavy machinery.
Advanced cold-heading machinery and high-speed thread rollers ensuring tight control over tolerances and high repeatability.
We control every manufacturing phase, from raw steel wire inspection to final surface coating, to guarantee compliance with international standards.
Fully compliant with DIN 912, DIN 6921, DIN 934, and DIN 125 configurations, allowing for direct replacement in European machinery.
Equipped with material hardness, tensile, and shear-testing instruments to verify mechanical properties for demanding projects.
Compliant surface-treatment options, including hexavalent chromium-free zinc and environmentally sound passivation.
Manufactured using multi-station cold-heading equipment, delivering tight tolerances down to the millimeter range.
Our fasteners provide reliable holding power across critical global infrastructure, industrial equipment, and assembly projects.
Our heavy-duty galvanized U-bolts and double-headed studs anchor structural steel beams and support heavy pipe assemblies. Built to withstand vibration and environmental degradation, they maintain continuous tension under high mechanical stresses.
Utilizing high-tensile flanged bolts (such as DIN 6921) and nylon lock nuts to secure engine mounts, drivetrains, and chassis frames. These fasteners offer excellent resistance to rotational self-loosening and shear-induced fatigue failure.
Designed for hydraulic pumps, high-pressure valves, and earthmoving assemblies. High-strength socket head cap bolts (DIN 912) deliver reliable clamping force in space-restricted environments where hand tool accessibility is limited.
Dongshuo Fastener is actively transitioning toward modern manufacturing solutions. By investing in multi-station cold formers and automatic optical sorting equipment, we target zero-defect production rates for high-precision components.
Our research and development focuses on advanced materials and corrosion-resistant coatings, including zinc-nickel plating, which offers superior salt spray endurance compared to traditional coatings. We are also studying integrated micro-sensor technologies in smart fasteners to support real-time torque and load monitoring in critical infrastructure applications.
Integrating optical imaging systems on sorting lines to filter out dimensional variations before final packaging.
Upgrading heat-treatment systems to reduce carbon emissions and reusing energy from the cold-heading process.
How Dongshuo Fastener combines technical capability, raw material sourcing, and quality management to support your supply chain.
As a reputable fastener manufacturer, we maintain advanced production machinery and a skilled technical team to meet our customers' requirements for various fastener classes.
We pay close attention to environmental protection and sustainable operations. We employ eco-friendly materials and manufacturing processes to minimize our overall carbon footprint.
Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd. remains dedicated to the core philosophy of "Quality First, Customer First" to deliver robust fastening solutions.
Answers to critical technical and logistical questions to assist procurement directors and design engineers.
Our company is committed to providing high-quality fastener products and comprehensive solutions for customers in various industries. We have advanced production equipment and a professional technical team, which can meet the needs of customers for different types of fasteners. In addition, our location in Yongnian allows us to source raw materials efficiently and maintain competitive pricing.
For high-tensile headed fasteners (Grade 10.9 and above) undergoing acid pickling and electro-galvanizing, we implement a strict post-plating baking process. The parts are baked at 200°C to 220°C for at least 4 hours to release trapped atomic hydrogen, ensuring the integrity of the steel matrix under high preloads.
Yes. Our engineering department specializes in custom designs. We handle cold-forming and CNC machining processes for irregular U-bolts and double-headed bolts to meet your drawings, specified tolerances, and mechanical grades.
DIN 6921 flange bolts feature an integrated circular flange face beneath the hex head. This design eliminates the need for a separate washer, distributes the clamping pressure over a larger surface area, and is ideal for high-stress joints where surface indentation must be avoided.
Heavy nuts, specialized studs, and precision-threaded hardware for structural steel, pipe fitting, and high-load machinery.
Dongshuo Fastener
