Engineered to meet Norwegian TEK17 building codes, resisting extreme wind loads and coastal marine corrosion.
In Norway, structural engineering faces some of the most unforgiving challenges on earth. From offshore oil rigs in the North Sea to sub-zero industrial construction projects in Tromsø, the requirement for mechanical fasteners is dictated by extreme wind velocity, colossal snow loads, and corrosive coastal marine atmospheres. The Norwegian standard for metal cladding, structural framing, and solar farm racking requires fasteners to meet strict performance metrics beyond standard continental DIN protocols.
A key regulatory driver in Norway is the TEK17 framework (Building Regulations), which mandates rigorous life-cycle assessments and environmental resilience benchmarks. Fasteners must survive C4 (High Industrial/Coastal) and C5-M (Very High Marine) corrosion classes defined under ISO 12944. This dictates either high-grade duplex stainless steel (A4 or special alloy compositions) or carbon steel self-drilling screws protected by multi-layer advanced surface coatings (such as Ruspert, Dacromet, or hot-dip galvanization with a minimum thickness of 45-55 μm).
Furthermore, Norway's sub-zero winters induce brittle transition risks in standard steel fasteners. Mechanical connections must maintain low-temperature impact strength and resist hydrogen embrittlement. Sinsun Hardware's custom range of self-drilling screws is engineered specifically for cold-climate application, utilizing high-purity C1022A carbon steel combined with an advanced, computer-controlled carbonitriding process. This ensures optimal core ductility (HRC 28-32) combined with extreme point hardness (HRC 50-55) capable of drilling through high-tensile steel framing without point burn-out or sudden brittle failure.
Established in 2006, Sinsun Hardware has grown to become Northern China's leading manufacturer of high-quality self-tapping and self-drilling screws. Operating out of a state-of-the-art 30,000 sqm integrated production facility, we supply over 8,500 shipping containers of advanced fasteners annually to major global infrastructure markets. Our manufacturing flow is completely vertically integrated—starting from raw steel wire rods, through cold-heading, heat-treating, thread-rolling, surface coating, and onto automated quality control packing.
Unlike standard generic suppliers, Sinsun relies exclusively on core raw steel sourced from premier steel producers, primarily the Ansteel Group. Our massive scale allows us to maintain a constant inventory within our 12,000 sqm smart warehouse (with an 18,000+ pallet capacity), enabling direct container loading and guaranteed, ERP-tracked delivery timelines.
Our cold-heading facility is powered by high-speed German machinery, achieving tolerances under ±0.02mm, while our drill point tail-grippers utilize Taiwanese technology to ensure rapid, burr-free steel penetration.
We operate four continuous mesh belt heat treatment lines processing 20 tons of fasteners daily, allowing precise control over gas flow, temperature, and annealing profiles for optimal carbonitriding.
High-quality building components designed for concrete cladding, timber assemblies, and interior finish systems in Northern Europe.
Where generic fasteners fail, our tailored metallurgy meets the physical demands of Nordic infrastructure.
High-salinity coastal settings require heavy-duty corrosion resistant self-drilling screws with Ruspert coating, eliminating structural degradation caused by sea spray and salt fog.
Modern Norwegian commercial buildings rely on prefab sandwich wall panels. Our precision-engineered self-drilling tips pierce 6.0mm cold-rolled steel purlins in under 3.5 seconds, saving labor.
With wind loads exceeding 3.5 kPa in coastal regions, metal roofs are vulnerable to tear-off. Our roofing screws incorporate premium EPDM washers, providing long-lasting seal integrity under extreme pressure.
Our operational methodology ensures transparency, full batch traceability, and rapid industrial delivery.
We review mechanical demands, including steel yield strength, expected wind exposure, and environmental corrosion categories (C1-C5).
Our engineers specify the thread geometry, steel grade, heat treatment depth, and protective plating before submitting a transparent quote.
We provide physical prototype batches for testing at your facility or independent testing centers, validating shear and pull-out values.
Utilizing cold heading machinery, we execute real-time dimensional checks, followed by our custom gas-fired carbonitriding process.
We provide comprehensive material test reports, dimensional inspection logs, and salt spray test certificates for total project quality clearance.
We execute customized packing options, sea freight optimization, and customs clearance support to ensure uninterrupted delivery schedules.
Since our founding in 2006, Sinsun Hardware has systematically upgraded technology and capacity, evolving from a regional factory to an international supplier.
Our control starts at the source. We purchase wire rods from elite domestic steel companies, and perform in-house annealing and precision wire drawing. Combined with high-speed cold-heading machines and automated sizing, we maintain dimensional consistency across large-volume production runs. This vertical model enables short lead times and reduces production bottlenecks.
Review the performance of our customized fastening solutions in real-world application environments.
Challenge: An energy developer in Stavanger required custom structural bolts for high-vibration wind turbine housings. Standard components suffered fatigue failure under constant arctic wind shifts.
Sinsun Solution: We developed custom fasteners with modified thread profiles and proprietary lock-patching. We applied carbonitriding heat treatment, boosting tensile strength to 1,050 MPa and maintaining low-temperature core ductility.
Result: These assemblies achieved a 15% reduction in installation torque while enduring 2,000-hour vibration testing without preload loss.
Challenge: An aquaculture facility along the coast of Bergen reported rapid corrosion of standard galvanized self-tapping screws used in steel mesh frame platforms, creating structural risks.
Sinsun Solution: We recommended high-grade duplex stainless steel fasteners with a multi-layer zinc-flake passivation coating. Every production batch underwent rigorous salt-spray testing to confirm protective barrier integrity.
Result: The upgraded fasteners have maintained structural integrity under direct sea spray, eliminating premature failures and extending platform service life.
Get authoritative answers on metallurgical specifications, chemical resistance, and installation metrics.
We use high-purity C1022A steel and controlled heat treatment to maintain a core hardness of HRC 28-32. This keeps the screw ductile, preventing low-temperature brittle fractures common in over-hardened fasteners.
Yes. Our structural fasteners comply with EN 14592 standards. We provide complete manufacturing documentation, material mill certificates, and third-party laboratory reports to simplify compliance with Norwegian TEK17 building codes.
For extreme offshore exposure, we recommend duplex stainless steel or multi-layer zinc-flake coatings, which endure over 1,000 hours in neutral salt spray testing without red rust formation.
After acid pickling and electroplating, high-strength carbon steel fasteners undergo a baking process at 200°C to release trapped hydrogen gas, preventing delayed brittle failures under constant mechanical stress.
Standard fastener shapes typically ship within 4 to 6 weeks from our plant. Customized requests requiring tooling changes or premium alloy sourcing are completed on a set schedule outlined with each quote.
Browse Sinsun Hardware's full selection of heavy-duty industrial fasteners, nails, and anchors.
Connect with Sinsun Hardware's technical team today. Send us your drawings, mechanical specifications, or project details, and our engineering department will deliver a customized quote within 48 hours.
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