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Premium Fasteners & Fixings for Industrial Excellence

High-quality brass fasteners, chemical anchors, hot forged parts, and industrial fixings from Qingdao Donsen – trusted by global partners since 2015.

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About Qingdao Donsen

Qingdao Donsen International Trading Co., Ltd is a fasteners manufacturing company based in China, located in Qingdao. Established in 2015 by a team of experienced professionals with deep roots in the fasteners industry since 2008, we bring unmatched expertise and product knowledge to every project.

Our mission is to deliver high-performance fastening solutions that meet international standards, serving industries ranging from construction and automotive to marine and aerospace.

  • ISO & DIN Compliant
  • Global Export Experience
  • OEM & Custom Solutions
Factory production line

Our Product Range

From standard fasteners to custom hot forged components, we offer a comprehensive portfolio engineered for durability, precision, and performance.

Brass Allthread

Brass Allthread

Corrosion-resistant threaded rod ideal for marine and electrical applications.

Brass Fasteners
Hexagon Brass Nut

Hexagon Brass Nut (DIN934)

Precision-machined brass nuts with high tensile strength and excellent conductivity.

Brass Nuts
Through Bolt Zinc & Yellow

Through Bolt Zinc & Yellow

Galvanized steel through bolts with enhanced corrosion resistance for outdoor use.

Fixings
Sleeve Anchors

Sleeve Anchors, Hexagon Nut Type

Heavy-duty expansion anchors for concrete and masonry applications.

Sleeve Anchors
Die Hot Forged Chain Rings

Hot Forged Chain Rings

High-strength forged steel rings for lifting and rigging systems.

Die Hot Forging
Brass Screws

Brass Screws

Aesthetic and durable screws for decorative and functional applications.

Brass Fasteners
Hexagon Full Nuts

Hexagon Full Nuts (DIN934, ISO4032)

Standard metric nuts for general industrial fastening.

Nuts
Plasterboard Fixings

Plasterboard Fixings

Specialized fasteners for drywall and partition systems.

Light Duty Fixings
Eye Bolt Shield Anchors

Eye Bolt Shield Anchors

Load-bearing anchors with eye loops for suspension and lifting.

Shield Anchors
Locking Cam Gear

Locking Cam (Gear) Cam L&R

Heavy-duty locking mechanisms for container doors and enclosures.

Non-standard
Brass Washers

Brass Washers

Conductive and corrosion-resistant washers for electrical grounding.

Brass Washers
Drop in Wedge Anchors

Drop in Wedge Anchors

Internal expansion anchors for flush mounting in concrete.

Drop in Wedge

Why Choose Fasteners-DS?

We combine engineering excellence with rigorous quality control to deliver fasteners you can trust.

Certified Quality

All products undergo strict inspection and comply with DIN, ISO, and ASTM standards.

Fast Global Delivery

Efficient logistics network ensures timely delivery to North America, Europe, Asia, and beyond.

Custom & OEM Solutions

We specialize in non-standard and die hot forged parts tailored to your specifications.

Rigorous Quality Control

At Donsen, quality is not an afterthought—it's built into every process. From raw material sourcing to final packaging, we maintain full control over production.

  • Site Management: Real-time monitoring of production lines and inventory.
  • Inspection: 100% dimensional checks and batch sampling for mechanical properties.
  • Packaging: Anti-corrosion wrapping and export-grade cartons.
  • Delivery: On-time shipment tracking and documentation support.
Quality inspection process
10+
Years Industry Experience
50+
Global Markets
200+
Custom Projects
99.8%
Customer Satisfaction

Frequently Asked Questions

Get answers to common inquiries about our products and services.

What materials do you offer for fasteners?

We manufacture fasteners in carbon steel, stainless steel, brass, zinc alloy, and custom alloys based on client specifications.

Can you produce non-standard or custom fasteners?

Yes, we specialize in OEM and non-standard parts, including die hot forged components tailored to your drawings and requirements.

What certifications do your products meet?

Our products comply with DIN, ISO, ASTM, and GB standards. We provide material test certificates (MTC) upon request.

What is your typical lead time?

Standard products: 15–20 days. Custom orders: 25–35 days, depending on complexity and quantity.

Do you offer samples?

Yes, we provide free samples for evaluation. Shipping costs may apply depending on destination.

Get in Touch

For inquiries, quotes, or technical support, reach out to our team directly.

Contact Information

  • Phone: +86 186 6979 4793
  • Email: Available via official website
  • Location: Qingdao, China
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