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Premium Fasteners for Global Industries

Ningbo Gangtong Zheli Fasteners Co., Ltd is a leading Chinese manufacturer of high-strength standard fasteners. With over two decades of experience, we deliver reliable, durable, and precision-engineered bolts, nuts, washers, and more to clients worldwide.

Industrial Fasteners
GTZL Factory

About Gangtong Zheli

Ningbo Gangtong Zheli Fasteners Co., Ltd is a manufacturer in China which mainly produces high-strength standard fasteners. Founded in 2001, the company has experienced rapid growth over the past two decades.

Our factory is located in the Ningbo Zhenhai Chemical Industrial Area, covering approximately 15,000 square meters, with a monthly production capacity of 2,000 tons. Our headquarters and foreign sales department are based at the Ningbo Jiangdong Eastern Business Centre.

2001

Founded

15K m²

Factory Area

2000 Tons

Monthly Output

Global

Export Reach

Our Products

We specialize in manufacturing a wide range of high-strength fasteners used across construction, automotive, energy, and industrial sectors. All products meet international standards and are rigorously tested for quality.

High-Strength Bolts

High-Strength Bolts

Available in carbon steel, alloy steel, and stainless steel (SS304/SS316). Ideal for structural and heavy-duty applications.

  • • DIN, ISO, ANSI Standards
  • • Grades 8.8, 10.9, 12.9
  • • Hex, Flange, and Custom Heads
Nuts

Nuts

Precision-engineered hex nuts, lock nuts, and flange nuts for secure fastening in demanding environments.

  • • Compatible with ISO/DIN bolts
  • • Grades 5, 8, 10
  • • Zinc, Hot-Dip Galvanized Coating
Threaded Rods

Threaded Rods (Stud Rods)

Fully threaded rods in various lengths and diameters, suitable for anchoring, suspension, and structural connections.

  • • Material: Carbon Steel, SS304, SS316
  • • Diameter: M6–M64
  • • Custom Cutting Available
Washers

Washers

Flat, spring, and locking washers designed to distribute load and prevent loosening under vibration.

  • • DIN 125, ISO 7089 Compliant
  • • Carbon & Stainless Steel
  • • Anti-Corrosion Coatings
Screws

Machine Screws

Fine-thread and coarse-thread machine screws for precise assembly in mechanical and electrical systems.

  • • Phillips, Slotted, Hex Heads
  • • M2–M20 Sizes
  • • SS304 / SS316 Options
Stainless Steel Fasteners

Stainless Steel Fasteners

Corrosion-resistant bolts, nuts, and washers made from SS304 and SS316 for marine, chemical, and food industries.

  • • A2-70, A4-80 Grades
  • • Excellent Oxidation Resistance
  • • Non-Magnetic (SS316)
Anchoring Bolts

Anchoring Bolts

J-bolts, L-bolts, and double-end rods for concrete and foundation anchoring in construction projects.

  • • Custom Bending Available
  • • High Tensile Strength
  • • Galvanized or Epoxy Coated
Flange Fasteners

Flange Fasteners

Complete bolt-nut-washer kits for pipeline flanges, pressure vessels, and industrial equipment.

  • • ASME B16.5, DIN Standards
  • • Stud Bolts + Hex Nuts
  • • Full Material Traceability

Why Choose GTZL Fasteners?

We combine advanced manufacturing, strict quality control, and global logistics to deliver fasteners you can trust.

Quality Assured

ISO-certified processes and 100% batch testing ensure every fastener meets international standards.

Fast Delivery

2,000-ton monthly capacity and strategic port access enable quick turnaround and global shipping.

Custom Solutions

We offer OEM/ODM services, custom sizes, coatings, and packaging to meet your exact needs.

Global Support

Dedicated sales team available via phone, WhatsApp, and email for technical and logistics support.

2001

Founded

15K

m² Factory

2000

Tons/Month

50+

Countries Served

Frequently Asked Questions

What materials do you offer?

We manufacture fasteners in carbon steel, alloy steel, stainless steel (SS304, SS316), and customized materials upon request.

Do you provide certifications?

Yes, we provide material test certificates (MTC), inspection reports, and can comply with ISO, DIN, ANSI, and other international standards.

Can you do custom manufacturing?

Absolutely. We offer OEM and ODM services, including custom dimensions, threading, coatings, and packaging.

What is your minimum order quantity (MOQ)?

Our MOQ varies by product but is typically flexible. Contact us for specific details based on your requirements.

How do you ensure quality control?

We have an in-house quality lab that performs tensile testing, hardness testing, salt spray testing, and dimensional inspection on every batch.

Get in Touch

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

Phone / WhatsApp

0086-18969835677

Email

info@gtzl-cn.com

Fax

0086-574-86657066

Sales Office

Room C069 (4-1) (4-2), No.003 Building, Zhongshan East Road No.1083, Yinzhou District, Ningbo, Zhejiang, China

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