High-precision components manufactured to international DIN/ISO/ASTM standards.
Established in 2015, Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd. has emerged as a titan in the fastener heartland of China. With a focus on Square Washers and complex industrial bolts, our facility integrates traditional metalworking expertise with modern data-driven quality control.
Our engineering team views a square washer not just as a spacer, but as a critical component for load distribution and vibration dampening. We specialize in custom dimensions that exceed standard DIN 436 requirements, ensuring maximum surface contact in seismic and heavy-timber construction.
Our factory utilizes multi-stage cold forging and precision stamping technologies. From Grade 4.8 to 8.8, and surface treatments ranging from Hot-Dip Galvanizing (HDG) to Geomet coatings, we ensure longevity in corrosive environments.
The evolution of square washers from passive hardware to smart industrial components.
As the global construction and energy sectors transition towards Green Infrastructure, the demand for high-performance square washers is shifting. Handan Dongshuo is currently investing in three major technological frontiers:
Tailored fastener ecosystems for the world's most demanding sectors.
Supplying specialized square washers for utility-scale solar farms. Our products handle the unique torque requirements of torque tubes and aluminum framing, preventing galvanic corrosion.
In mass timber and CLT (Cross Laminated Timber) projects, our oversized square washers prevent bolt heads from pulling through fibers during seismic events, providing life-saving structural integrity.
Railway and bridge projects require fasteners with extreme fatigue resistance. Our hot-dip galvanized washers are the industry standard for durability in harsh outdoor climates.
Leveraging automation to secure your global supply chain.
In an era of supply chain volatility, Dongshuo Fastener Manufacturing provides a "Safe Harbor." By integrating IoT monitoring in our stamping lines and real-time inventory management, we ensure that global procurement officers have visibility, consistency, and traceability from raw steel coils to the final packaged pallet.
Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd. is committed to providing high-quality fastener products and providing customers with comprehensive solutions in various industries. We have advanced production equipment and a professional technical team to meet our customers' needs for different types of fasteners.
Focus: Design, Engineered, Manufactured.
Located in Handan City, Hebei Province (the fastener hub of China). Our facility is just one hour from Handan Airport, welcoming global partners for on-site audits and technical discussions.
Expert insights into procurement and technical specifications.
Square washers provide a much larger surface area, which is vital for distributing pressure on soft materials like wood or for fitting into slotted holes in steel structures where a round washer might slip or fail to bridge the gap.
We primarily manufacture to DIN 436, but we frequently produce custom sizes for ASTM A36 and AS 1100 requirements, ensuring global compliance for any construction project.
For coastal or high-humidity environments, we recommend our Hot-Dip Galvanized finish, which provides a thick sacrificial layer of zinc, or our 316 Stainless Steel options for ultimate longevity.
Yes, we accept RMB (CNY) as well as USD. For orders over 1000USD, we typically work on a 30% T/T advance and 70% balance before shipment.
Lead times depend on tool complexity. Standard OEM orders typically take 15-30 days, including mold development and sample confirmation.
Absolutely. Every batch comes with a certificate of conformity and MTR, documenting the chemical composition and mechanical properties of the steel used.
Explore our full range of industrial bolts and locking systems.
Let's engineer your next success story together.
Our team is standing by to provide technical consultation, CAD drawings, and volume pricing. As a leading Square Washer Supplier in China, we prioritize your project's timeline and safety standards.
Handan Yongnian Dongshuo Fastener Manufacturing Co., Ltd.
Address: Handan City, Hebei Province, China
"We take pride in providing timely, reliable and useful services."
Dongshuo
