Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd., established in 2015, stands as a beacon of engineering excellence in China's "Fastener Capital." With nearly a decade of specialization, we have evolved from a local factory into a global leader in high-precision fastening solutions. Our commitment goes beyond manufacturing; we provide engineered security for industries ranging from aerospace to sustainable energy.
In high-density urban development, long screws are the unsung heroes of structural integrity. From fixing deep insulation layers in commercial skyscrapers to securing heavy-duty cladding, our Grade 8.8 and 10.9 long fasteners provide the necessary shear strength and pull-out resistance.
Localization Tip: In regions like Northern Europe or North America, seismic-rated long screws are mandatory for timber-frame high-rises to accommodate structural shifts.
The global shift toward green energy requires fasteners that can withstand extreme oxidative environments. Our galvanized and DACROMET-coated long bolts are utilized in mounting systems for solar arrays and internal turbine assemblies, ensuring 25-year lifespans without structural failure.
Long carriage bolts and specialized U-bolts are critical in the assembly of shipping containers and heavy-duty logistics trailers. The ability to bridge large gaps in chassis components while maintaining high torque tension is a hallmark of Dongshuo’s engineering.
Implementation of multi-station cold heading machines to ensure thread consistency across lengths exceeding 300mm.
Transitioning to eco-friendly trivalent chromium plating and zinc-nickel alloys for 1000+ hour salt spray resistance.
Embedding "Smart Tracking" via laser-etched QR codes on batches for full material traceability (BIM ready).
Utilizing neural-network-driven visual inspection systems to eliminate microscopic thread defects in high-volume orders.
Located in the heart of Hebei’s industrial cluster, Dongshuo leverages a vertically integrated supply chain. This is not just about manufacturing; it's about the speed of innovation. While western counterparts may face lead times of 12-16 weeks, our proximity to raw material steel mills and specialized heat-treatment facilities allows us to reduce fulfillment cycles by 40%.
Navigating international building codes can be complex. Dongshuo ensures that every "Long Screw" batch adheres to stringent global benchmarks:
Full compliance with DIN 975, DIN 976, and DIN 6921 for metric specifications preferred in European markets.
Rigid adherence to North American thread pitches and tensile strength requirements for industrial construction.
RoHS and REACH certified coatings, ensuring our products are safe for residential and commercial eco-builds.
A1: Long fasteners are prone to "bowing" or hydrogen embrittlement during the tempering process. At Dongshuo, we utilize vertical vacuum heat treatment furnaces to ensure uniform hardness (HV) throughout the entire length of the screw, preventing snapping under high torque.
A2: The integrated flange acts as a built-in washer. In long-screw applications where the substrate might be thinner than the fastener length, the flange increases the surface area contact, significantly reducing the risk of "pull-through" and ensuring a waterproof seal in roofing applications.
A3: Absolutely. As a direct factory, we offer OEM services. Whether you need partially threaded long bolts for pivot points or fully threaded rods (DIN975) for tensioning, we can adjust our production molds to your exact specifications.
A4: Black Phosphating is ideal for interior drywall and woodworking as it provides a porous surface that bonds well with paint and joint compounds. Galvanization is the gold standard for exterior use, offering sacrificial protection against moisture and electrolytic corrosion.
A5: We utilize palletized fumigated wooden crates with moisture-wicking VCI liners. Our logistics team handles all customs documentation (CO, Form E, etc.) to ensure duty-optimized entry into your local market.
Whether you are designing a new industrial facility or managing a large-scale procurement contract, Dongshuo Fastener Manufacturing provides the technical expertise and manufacturing scale you need.
Address: Handan City, Hebei Province, China
Specialty: High-Quality Long Screws, Industrial Bolts, Global Export Compliance.
Dongshuo
