Direct factory supply featuring optimized coatings, superior tensile strength, and structural integrity matching the Finnish EN 14592 building regulations.
Finland's industrial landscape is heavily defined by its demanding geographic and climatic parameters. From the advanced timber construction sector (Cross-Laminated Timber - CLT and Glulam) dominant in Central and Northern Finland, to the high-tech marine shipyards along the southwestern coast (Turku, Helsinki), standard commercial fasteners are fundamentally inadequate. Sourcing for Finland requires a strict comprehension of cold-weather steel embrittlement and high-moisture corrosion pathways.
Under sub-zero temperatures (frequently reaching below -40°C in Lapland and Arctic regions), low-grade carbon steels undergo a rapid transition from ductile to brittle state. Our production utilizes premium alloy grades (such as boron-modified carbon steels and specialized SS316 stainless alloys) processed with precision spheroidizing annealing to preserve impact toughness down to extreme temperatures.
Furthermore, the Finnish building code complies with strict European standards. Fasteners designed for timber structures must support load capacities dictated by EN 14592:2008+A1:2012. Meanwhile, marine and coastal infrastructures necessitate C4 (Industrial & Coastal) or C5 (Marine/Highly Polluted) atmospheric corrosion protection classes, demanding specialized Hot-Dip Galvanization (HDG), organic zinc-flake coatings, or marine-grade stainless steels.
Established in 2006, Sinsun Hardware operates a sprawling 30,000 sqm vertically-integrated facility, supporting global industrial sourcing from raw wire drawing to final quality inspection.
Using premium raw coils from Xingtai Steel, we conduct in-house spheroidizing annealing and precision cold wire drawing to optimize steel grain structure prior to heading.
Multi-station cold heading machinery from Germany combined with precise Taiwanese thread-rolling technologies ensures thread accuracy and consistency.
Our continuous mesh-belt carburizing and tempering furnaces achieve a uniform hardness matrix (HRC 28-32 for wood screws, core hardness up to HV 450 for self-drillers).
Sinsun set up its first specialized manufacturing factory in northern China with a primary dedication to producing premium self-tapping screws.
Establishment of the dedicated Export Department, shifting business from regional supply to international industrial supply chains.
Integrated four spheroidizing annealing gas furnaces and automated wire-drawing units to control physical steel grain and hardness properties at the source.
Imported German multi-station cold heading machinery. Added self-drilling fastener lines to address precise structural requirements.
Reached an annual production output of 36,000 tons. Handled over 1,100 high-capacity export containers worldwide.
Installed four next-gen mesh belt heat treatment lines to ensure high shear-strength ratings and reliable delivery schedules.
Fastener SKUs
Integrated Plant Area
Annual Containers Shipped
EU REACH Compliant
Exploring advanced anti-corrosion barrier layers, structural fatigue resistance, and environmental carbon reduction strategies for Northern Europe.
For architectural projects in Helsinki or maritime vessels operating in the Gulf of Bothnia, standard zinc plating (which typically fails within 48 to 96 hours of salt spray testing) is unacceptable. Sinsun implements double-barrier coating configurations:
1. Hot-Dip Galvanization (HDG): Delivers a thick coating layer of zinc (minimum 55–80 μm) that forms a sacrificial metallurgical bond with the steel, safeguarding against high atmospheric moisture and coastal salt concentrations.
2. Organic Zinc-Flake / Ruspert Coatings: A multi-layer system of ceramic-metallic particles. Our Ruspert technology provides up to 1,500 hours of resistance (ASTM B117 salt spray test) without provoking hydrogen embrittlement in high-tensile structural fasteners.
3. Marine-Grade Stainless Steel (A4 / Grade 316): Formulated with 2% molybdenum to prevent pitting corrosion under chlorine exposure from marine spray, optimized for harbor decking and coastal machinery components.
| Fastener Metallurgy | Standard Hardness | Tensile Strength | Corrosion Protection (Salt Spray) |
|---|---|---|---|
| Grade 316 Stainless Steel | HRB 70 - 95 | 500 - 700 MPa | C5-M Marine Class (Lifetime) |
| Boron Carbon Steel (Heat-treated) | HRC 28 - 32 | ≥ 1,000 MPa | Ruspert Coated (1500 Hrs) |
| Alloy Structural Steel (HDG) | HRC 22 - 28 | ≥ 800 MPa | Hot-Dip Galv (500-1000 Hrs) |
| Hardened Carbon Steel (Zinc) | Core HV 350-450 | ≥ 650 MPa | C2-C3 Mechanical (240 Hrs) |
To align with Finland’s goal of carbon neutrality by 2035, Sinsun is auditing energy efficiency within our spheroidizing annealing furnaces to transition toward lower-carbon footprint fasteners.
Timber construction is evolving with CLT panel usage. Our next-generation exterior wood screws feature self-countersinking ribbed heads and advanced twin-lead threads to avoid wood splitting without pre-drilling.
Providing full material trace documentation (EN 10204 3.1 chemical analysis certification) ensuring total traceability for tier-1 European construction and infrastructure works.
Explore our structural nails, self-tapping screws, and concrete anchor lines, optimized for northern construction and manufacturing demands.
Managing importing procedures into Finnish ports such as the Port of Helsinki (Vuosaari) or Port of Kotka-Hamina requires efficient logistic oversight and clear compliance documentation. Sinsun's 12,000 sqm smart warehouse, featuring a capacity of 18,000+ pallets, operates as a logistics hub ensuring that standard and custom products are sorted, packed, and loaded efficiently.
We export over 8,500 containers annually. For our Northern European partners, we provide optimized sea freight transit options through European hub networks, alongside full cargo documentation to support customs clearance:
A visual inspection of our raw material warehousing, multi-station cold heading systems, and in-house laboratory testing facilities.
Technical clarifications addressing corrosion ratings, shipping times, CE certification compliance, and metallurgy for procurement managers.
Consult our technical engineers for detailed product catalogs, raw material chemical certifications, coating performance test reviews, and volume-based pricing for the Finland market.
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