Explore our foundational range of certified global fasteners, including structural wood screws, concrete anchors, rivets, and heavy-duty nuts developed under rigorous ISO 9001 protocols.
Butterfly nuts (commonly classified under DIN 315 or ASME B18.6.x guidelines) are vital mechanical fasteners specifically designed for rapid assembly and disassembly applications without tool intervention. Leveraging two wing-like projections, these components convert finger torque directly into clamping load.
In the modern manufacturing sector, the global demand for butterfly nuts is driven by logistics efficiency, machine access doors, electrical control cabinets, chemical processing vessels, and renewable energy arrays. The transition toward smart logistics and modular structural designs requires high mechanical consistency. Consequently, sourcing reliable manufacturing lines capable of maintaining tight tolerances and providing continuous supply has become a strategic priority for multinational industrial buyers.
Structural Lightweighting: Rapid adoption of engineered polymers and aerospace-grade lightweight aluminum alloys in transport infrastructure.
Corrosion Mitigation: Migration from standard zinc plating to advanced organic coatings like Dacromet and Geomet to handle extreme weather, resisting salt spray up to 1000+ hours.
Standardization Integration: Demands for perfect interoperability between European (DIN) and North American (ANSI/ASME) standards in oil and gas and telecommunication setups.
Founded in 2006, Sinsun Hardware has grown to become Northern China's largest producer of Self-Tapping Screws and a trusted strategic supplier of premium industrial fasteners. Operating from our state-of-the-art 30,000 sqm integrated facility, Sinsun coordinates complex manufacturing pathways, featuring a 12,000 sqm smart warehouse capable of handling 18,000+ pallets. Our global logistics footprint exports over 8,500 shipping containers annually across critical corridors in the Middle East, Southeast Asia, South America, and Russia.
We source premium quality carbon steel and alloys directly from XING TAI Steel and Ansteel Group. All incoming shipments undergo in-house spheroidizing annealing to refine the microstructure before cold-working processes.
Utilizing high-precision multi-station cold heading machines imported from Germany, and custom engineering frameworks developed in Taiwan, we manufacture parts with extreme tolerances (±0.02mm) and surface finish values of Ra ≤ 0.4μm.
Every production batch undergoes 12+ strict testing gates, including optical sorting, HRC hardness validation (HRC 28-32), and destructive tensile strength inspections to guarantee consistent performance.
Trace our development, engineering expansion, technology integration, and operational milestones leading to our position as a primary international manufacturing partner.
Established as a localized industrial fastener specialist in Northern China, focusing on quality self-tapping screws and precision components.
Implemented international export channels, standardizing DIN and ANSI fasteners for delivery to Eastern Europe and the Middle East.
Upgraded our cold heading division with imported high-performance German multi-station equipment, achieving output rates exceeding 1,200 pieces per minute.
Reaching an annual production yield of 36,000 metric tons, supported by a 12,000 sqm automated warehousing facility and advanced heat treatment setups.
Our butterfly nuts are engineered for demanding industrial environments. The table below represents our default technical capabilities for custom orders and standard inventories.
| Specification Parameter | Carbon Steel Series (Standard) | Stainless Steel Series (Corrosion Resistant) |
|---|---|---|
| Thread Range | M3 to M24 / #6 to 1" | M3 to M20 / #6 to 7/8" |
| Standards Compliance | DIN 315, ASME B18.6.x | DIN 315, ISO 3506-2 |
| Available Materials | C1008, C1015, C1022A | SS304, SS316, Duplex 2205 |
| Surface Treatments | Zinc Plating, Hot Dip Galv, Dacromet | Bright Polish, Passivated, PTFE Coating |
| Hardness / Tensile | HRC 28-32 / 1,000+ MPa | A2-70 / A4-80 (700-800 MPa) |
| Dimensional Tolerance | ±0.02 mm (Thread Class 6H/2B) | ±0.03 mm (Thread Class 6H) |
Different industries require specific material and structural parameters for butterfly nuts to ensure optimal performance. Our specialized engineering adapts to these unique configurations:
Marine docks, offshore instrumentation, and vessel utility systems rely on Grade 316 Stainless Steel Wing Nuts. These parts are passivated to withstand high-saline conditions, preventing pitting and crevice corrosion over extended service periods.
For processing machines requiring quick cleaning protocols, our cold-forged steel wing nuts allow technicians to disassemble safety screens without additional tools, minimizing operational downtime.
Outdoor cabinets and telecom routing systems rely on carbon steel wing nuts finished with a high-durability organic coating. These coatings ensure grounding continuity while preventing galvanic corrosion at interface junctions.
We continuously optimize our fastener designs. Below is our technology roadmap outlining advancements in product performance, process integration, and material resilience.
Our target for 2026 includes integrating inline computer-vision tracking systems across our cold forging lines. This automated setup analyzes dimensional parameters in real-time, matching target values with low tolerance variances for every production run.
We are transitioning from standard electro-galvanization systems to eco-compliant, high-performance protective systems. Our new surface treatments provide robust barrier protection without chromium compounds.
As a global supplier, Sinsun Hardware understands that supply security is just as important as mechanical performance. We offer tailored logistics and engineering services designed to minimize lead times and stabilize operational overhead.
Utilizing our 12,000 sqm smart warehouse facility, we offer Vendor Managed Inventory (VMI) frameworks for qualified enterprise customers, reducing holding costs and ensuring reliable component availability.
Our engineering division develops custom fastener dimensions and structural properties, converting customer CAD drawings into functional physical prototypes within 48 to 72 hours.
Every shipment is marked with unique batch identifiers linked directly to raw material heat codes, offering complete metallurgical traceability from steel plant to final delivery.
These documented projects demonstrate how Sinsun Hardware addresses complex technical challenges for international industrial operations.
Challenge: A tier-1 automotive partner required custom structural flange bolts with high resistance to vibration and weight reduction requirements.
Sinsun Solution: We designed a structural fastener utilizing a specialized alloy configuration and thread-locking features, supported by full testing protocols to verify performance under high vibrations.
Result: Achieved a 15% reduction in weight while successfully completing a 2,000-hour vibration cycle program with zero thread failure incidents.
Challenge: A marine engineering client required large-diameter structural bolts to withstand harsh, high-salinity offshore environments.
Sinsun Solution: Recommended and manufactured fasteners utilizing duplex stainless-steel grades, paired with a specialized chemical passivation process and full material traceability certification.
Result: The offshore infrastructure project was completed successfully with zero corrosion failures recorded over the initial multi-year cycle.
Find technical answers regarding our manufacturing capacity, custom butterfly nut parameters, and logistics capabilities.
We provide structural flexibility depending on the item complexity. Standard carbon steel and stainless steel butterfly nuts have standard container or pallet-level MOQs. For custom designs or pre-production engineering tests, we can supply low-volume prototype batches. Contact our sales team for dynamic MOQ quotes.
Yes. Custom engineering is a core division of our manufacturing plant. We fabricate parts matching DIN, ANSI, ASME, ISO, JIS, and specialized customer blue-print schematics. Our technical team works in close collaboration from design verification to the final production stages.
We maintain comprehensive process controls, beginning with incoming inspections of raw steel wire, following through to in-process dimensional checking, heat-treating hardness analysis, plating thickness inspections, and ending with automated optical sorting to verify thread geometry and clear out defects.
Standard lead times average 4 to 6 weeks depending on product geometry, plating specifications, and total batch volume. We provide clear, firm shipment dates with every formal quotation.
Yes, we supply pre-production samples for physical and mechanical testing as a standard quality validation step before mass producing customer orders.
We manufacture butterfly nuts in carbon steel (grades C1008, C1010, C1022A), stainless steel (grades 304, 316, duplex alloys for marine applications), and selected brass alloys to match specific electrical conductivity or decorative requirements.
We offer electro-galvanization, hot-dip galvanizing, chemical passivation for stainless steel, black oxide, Teflon coatings, and high-performance Dacromet coating systems to withstand extreme weather conditions.
Explore our selection of specialized hardware, including lock washers, heavy-duty square wood screws, framing nails, and stainless steel fasteners engineered for heavy industrial and structural applications.
Get in touch with our technical sales division to receive engineering drawings, metallurgical certifications, and a comprehensive quote within 48 hours.
Contact Our Engineering Team
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