Heavy Hex Bolts

Heavy hex bolts are a type of critical industrial fastener widely used in high-strength connection applications. Their hexagonal head size is larger than standard hex bolts, providing higher torque capacity and more stable connection performance. They are suitable for fields with extremely high safety and reliability requirements, such as building structures, bridge engineering, steel structure connections, and heavy machinery.

As a professional heavy hex bolt manufacturer in China, Zeyao is committed to providing global customers with high-quality products that meet international standards (such as ASTM, DIN, ISO) and supports OEM/ODM customization services to meet the diverse needs of different engineering projects.

Zeyao's factory has 19 years of production experience, focusing on the R&D and manufacturing of non-standard fasteners. Equipped with over 160 advanced production lines, with a monthly output exceeding ten million pieces, we can efficiently and stably meet large-volume orders and customized needs. We help your projects progress smoothly with reliable quality, flexible customization capabilities, and professional service.

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Product Features

Higher Strength and Load Capacity

Heavy hex bolts are manufactured from high-strength materials and undergo rigorous heat treatment processes, achieving strength grades of 8.8, 10.9, and even higher, suitable for high-load environments.

Enlarged Hex Head Design

Compared to standard bolts, their enlarged hex head design provides a larger contact area, thereby improving torque transmission efficiency, reducing the risk of slippage, and enhancing installation stability.

Excellent Corrosion Resistance

Surface treatments such as galvanizing, hot-dip galvanizing, or Dacromet coating effectively enhance the bolts' corrosion resistance in outdoor or harsh environments.

Precision Thread Machining

The use of thread rolling technology ensures high thread precision, a secure connection, and improved fatigue resistance, extending service life.

Product Details

1. 19 Years of Fastener Manufacturing Experience

ZEYAO boasts over 19 years of experience in fastener production, focusing on the R&D and manufacturing of non-standard fasteners and industrial-grade standard parts. Through long-term production practice, we have accumulated rich engineering application experience, enabling us to provide more precise product solutions for different industries (such as steel structures, machinery manufacturing, and energy engineering), going beyond simply supplying standardized parts.

2. Focus on Non-Standard Customization Capabilities

Unlike single-standard parts suppliers, ZEYAO's core advantage lies in its non-standard fastener customization capabilities. We can provide comprehensive customization based on customer drawings or project requirements, including dimensions, threads, materials, strength grades, and surface treatments.

3. 160+ Production Equipment

ZEYAO possesses over 160 professional production equipment, covering the entire production process from raw material processing to finished product shipment, including cold heading equipment, hot forging equipment, thread rolling machines, heat treatment equipment, and surface treatment production lines.

4. Monthly Production Capacity Exceeding Ten Million Pieces

ZEYAO possesses mature large-scale production capabilities, with a monthly output reaching tens of millions of pieces, stably supporting the bulk purchasing needs of global customers. For engineering projects or long-term partners, stable supply is more important than a single low price.

5. Engineering-Grade Quality Control System

In the fastener industry, quality stability is directly related to structural safety. ZEYAO has established a complete quality control system, strictly adhering to standardized inspection procedures at every stage, from raw material testing and production process control to finished product inspection.

Furthermore, we support the provision of Material Testing Center (MTC) reports, dimensional inspection reports, and third-party testing (such as SGS and TÜV) to meet the compliance requirements of different countries and engineering projects, ensuring smooth entry of products into the global market.

6. Professional Service Capabilities for the Global Market

ZEYAO is not only a manufacturer but also a global fastener supply chain partner. We are familiar with the standard systems of different countries and regions (ASTM, DIN, ISO, etc.), enabling us to help customers quickly find product solutions that comply with local engineering specifications.

FAQ

Q: Are you a factory?

A: Yes, we are a fastener manufacturing factory with 19 years of experience.

Q: What materials do you use for heavy hex bolts?

A: We commonly use carbon steel and stainless steel, but we can also customize different materials according to your needs.

Q: What is the minimum order quantity for bolts?

A: Standard styles start at 10,000 pieces.

Q: Can you customize heavy hex bolts?

A: Yes, we support OEM/ODM customization.

Q: Do you provide free samples?

A: We can provide samples according to your requirements; you will need to pay for the shipping costs.

Q: If I produce using my drawings, will you keep them confidential?

A: Yes, we have confidentiality agreements with every customer.

Q: How long is the delivery time?

A: Sample lead time is 7-10 days; bulk order lead time is 15-30 days.