30+ Years

Dedicated To Manufacturing High-quality Fasteners

Since 1997

Providing Quality Studs

Engineered for Extremes:

Custom Solutions for Critical Projects

Featured Fastener Products

We specialize in hex nuts, heavy hex nuts, studs, and fully threaded rods, manufactured to major international standards

including GB, ASTM, ISO, UNI, JIS, DIN, BS and AS.

ASTM A194 2H Heavy Hex Nut BLACK OXIDE

ASTM A194 2HM Heavy Hex Nut Zinc Plated

ASTM A194 7L Heavy Hex Nut Zinc Plated

L7 L7M Stud Bolt With Nuts PTFE

About GYF

An enterprise dedicated to the research, development, and manufacturing of high- quality fasteners, while also actively embracing green development principles.

Manufacturing Facility

Highly Efficient Teams

Countries And Regions

Advanced Production And Inspection Equipment

Our Applications

Trusted in over 20 countries across North America, Europe, and Asia, our fasteners perform in critical environments—from petrochemical plants

and wind turbines to nuclear facilities, mining equipment and large-scale construction.

Construction

Provide high-strength and corrosion-resistant special alloy fasteners that are in line with PED certification. This ensures the reliability of sealing and connection even in extremely harsh environments, thereby safeguarding production safety.
Wind power

Provide high-strength and corrosion-resistant special alloy fasteners that are in line with PED certification. This ensures the reliability of sealing and connection even in extremely harsh environments, thereby safeguarding production safety.
Oil & Gas

Provide high-strength and corrosion-resistant special alloy fasteners that are in line with PED certification. This ensures the reliability of sealing and connection even in extremely harsh environments, thereby safeguarding production safety.

Construction

View More>
Wind power

View More>
Oil & Gas

View More>

Our Certifications

Driven by innovation, we hold ISO 9001, ISO 14001, and PED certifications, supported by dozens of patents. Our automated lines and in-house testing ensure every batch meets the highest standards of precision and reliability.

DIGITAL SHOWROOM

If you want to learn more about our manufacturing capabilities, you can click on the avatar in the scene, or accept my invitation!

News

Shanghai National Exhibition And Convention Center (Hongqiao), June 18, 2025

Shanghai National Exhibition and Convention Center (Hongqiao), June 18, 2025

10 March 2026

About GYF

Ningbo New Guangyuan Wind Energy Technology Co., LTD. , established in 1997. With over 30,000㎡ of modern facilities and decades of expertise, we deliver precision-engineered solutions for global industry.

10 March 2026

About GYF

GYF is a professional fastener manufacturer with 30 years of industry experience, dedicated to providing high-quality connection solutions for the oil and gas, wind power and large-scale engineering projects.An enterprise dedicated to the research, development, and manufacturing of high- quality fas

10 March 2026

Featured Fastener Products

About GYF

Our Applications

Our Certifications

DIGITAL SHOWROOM

News

Shanghai National Exhibition And Convention Center (Hongqiao), June 18, 2025

About GYF

About GYF

Quick Links

Products