Explore our premium grade selection of mechanical and structural fastening components manufactured directly under strict ISO quality controls.
In modern industrial assembly, standard hex bolts paired with separate washers present structural limitations, including point-load concentration and vibration-induced loosening. The integration of the flange head addresses these points of failure. The unified flange serves as a built-in washer that effectively distributes clamping pressure over a larger surface area, mitigating the risk of material deformation in soft metals and composite surfaces.
Globally, top flange screws are critical in automotive frame mounting, structural steelwork, pipe flange connections, and renewable energy racking assemblies. The unified piece design removes the handling steps of loose washers, accelerating automated assembly lines and reducing procurement complexities. Under strict standards such as DIN 6921 and ISO 4162, these fasteners are engineered to perform under cyclic dynamic stresses.
Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd. was established in 2015. It is an enterprise specializing in the production and operation of 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.
Our engineering capabilities cover three core phases of quality control and manufacturing:
Located in Yongnian, the fastener capital of China, our facility features multi-station cold headers, high-speed thread rollers, and automated heat-treatment chambers. This vertical integration allows us to optimize mechanical attributes and maintain tight dimensional tolerances, yielding consistent high-tensile ratings across all product lines.
Evaluating the manufacturing dynamics, cluster efficiencies, and material advantages that drive the global competitiveness of China's fastener industry.
By operating within the Yongnian industrial cluster, we draw upon a localized supply chain of raw wire rod drawing, precision tooling manufacture, and surface treatment facilities. This minimizes transport costs and optimizes lead times.
We utilize electro-galvanization, hot-dip galvanizing, zinc-flake coatings, and chemical passivation. This ensures our flange screws can withstand salt spray exposure testing (up to 1,000 hours without red rust).
Using optical sorting machines with high-resolution vision systems, we check thread pitches, head dimensions, and flange flat planes to guarantee a defect rate under 50 PPM (Parts Per Million).
Top flange screws find utility in heavy industries where fatigue resistance is a key design consideration. The following application matrices outline standard deployment configurations:
In steel building frameworks, wind-load shear and thermal expansion cycle joints continuously. DIN 6921 carbon steel and yellow zinc-plated hex flange bolts are deployed to fasten framework purlins and bracing elements, providing structural stability without requiring individual washers under every nut and head.
Chassis joints are subject to vibration and road shock. Automotive assembly lines use automated torque guns to drive flange screws into chassis members. The integrated flange prevents embedment into structural frames, maintaining preload force over the vehicle's lifespan.
Piping networks carry fluids under dynamic pressure cycles. Grade 8.8 and 10.9 flange bolts are used in pipeline flanges, distributing tension evenly to preserve sealing gasket integrity. Their anti-corrosive finishes prevent thread seizing in humid conditions.
Utility-scale solar farms require thousands of fast connections to anchor photovoltaic modules to structural frameworks. Self-drilling flange screws with protective coatings allow for rapid installation into galvanized steel tracks, saving on-site labor costs.
We provide high-quality fastener products and comprehensive industry solutions. Explore our customer terms and flexible manufacturing practices below.
The price is negotiable. It can be changed according to your quantity or packaging requirements. We work with our clients to optimize unit economics at volume scale.
The sample requires a sample fee, which can be paid on delivery or you can pay us the fee in advance. Standard samples are shipped within 3-7 working days.
All of our products are made of high-quality, environmentally friendly materials. We ensure compliance with RoHS and REACH regulations, as verified by independent testing laboratories.
We can adjust minimum order quantities (MOQ) according to your requirements. We support both large industrial shipments and smaller test runs.
You can send your own design and logo. We can open new molds and logos, and then send samples for confirmation prior to volume production runs.
Please email me or chat with me at your convenience. We maintain open communication channels to resolve logistical queries and order modifications.
We take pride in providing timely, reliable, and useful services. Let our engineering department assist in defining material specifications for your structural applications.
For specially customized products, after detailed discussion between both parties with agreements on technical parameters, price, delivery time, and other related details, customers could then confirm their order. If you have any questions, please feel free to contact us at any time.
Compare mechanical properties, dimensional standards, and target applications for industrial-grade flange screws.
| Standard Specification | Class/Grade Available | Tensile Strength (MPa) | Plating Options | Primary Applications |
|---|---|---|---|---|
| DIN 6921 / ISO 4162 | Class 8.8, 10.9, 12.9 | 800 to 1220 | Yellow Zinc, Zinc Flake, Galvanized | Structural Joints, Heavy Machinery |
| Hex Self-Drilling Screws | Case Hardened Steel | ≥ 540 | Color Galvanized, Blue-White Zinc | Metal Roofing, Solar Frame Assemblies |
| DIN 975 / DIN 976 Rods | Grade 4.8, 8.8 | 400 to 800 | Zinc Plated, HDG | Suspended Ceiling Support, Piping Anchors |
| U-Bolts & Custom Fasteners | Low to Medium Carbon Steel | 400 to 800 | Thick Hot-Dip Galvanized | Automotive Leaf Springs, Tube Clamping |
When you are keen on any of our items following you view our product list, please feel free to make contact with us for inquiries. You'll be able to send us emails and get in touch with us for consultation and we shall respond to you as soon as we are able to.
Additional engineering fasteners and high-performance components available for direct export, custom manufactured to global tolerances.
Dongshuo