Top 5 Carriage Bolt Manufacturers in China

Carriage bolts are essential fasteners in the construction and manufacturing industries, known for their distinctive domed heads and square necks that prevent rotation during installation. 

When selecting a carriage bolt manufacturer, it’s crucial to consider factors such as product quality, manufacturing capabilities, industry certifications, and customer service. 

Below are five notable carriage bolt manufacturers in China.

Top 5 Carriage Bolt Manufacturers

#1. CNRL Fasteners

Year Founded/Established: 1996

Headquarters: Zhejiang Province, China

CNRL Fasteners has established itself as a leading carriage bolt manufacturer with a focus on innovation and quality. 

The company offers a comprehensive range of fasteners, including standard and custom-designed carriage bolts to meet diverse industrial needs.

Certifications and Recognitions

• ISO 9001:2015
• ISO 14001:2015
• OHSAS 18001:2007

Key Strengths

• Advanced manufacturing facilities equipped with state-of-the-art machinery.
• Strong research and development team dedicated to product innovation.
• Commitment to environmental sustainability and workplace safety.

#2. Yijin Hardware Co., Ltd

Year Founded/Established: 2003

Headquarters: Shenzhen, China

Yijin Hardware specializes in precision fasteners, including high-quality carriage bolts. 

The company serves various sectors such as electronics, automotive, and construction, providing tailored solutions to meet specific client requirements.

Certifications and Recognitions

• ISO 9001:2015
• IATF 16949:2016

Key Strengths

• Expertise in producing custom fasteners with tight tolerances.
• Utilization of high-grade materials ensuring product durability.
• Efficient supply chain management facilitating timely deliveries.

#3. Handan Zhongpin Fasteners

Year Founded/Established: 1987

Headquarters: Hebei, China

With over three decades of experience, Handan Zhongpin Fasteners has become a reputable carriage bolt supplier known for its extensive product range and competitive pricing. 

The company caters to both domestic and international markets, adhering to stringent quality standards.

Certifications and Recognitions

• ISO 9001:2015
• CE Certification

Key Strengths

• Large-scale production capacity accommodating bulk orders.
• In-house testing facilities ensure product compliance.
• Strong distribution network enabling efficient global shipping.

#4. Shanghai Prime Machinery Co., Ltd

Year Founded/Established: 1980

Headquarters: Shanghai, China

Shanghai Prime Machinery is a diversified manufacturing enterprise with a significant presence in the fastener industry. 

The company produces a wide array of fasteners, including carriage bolts, serving industries such as infrastructure, energy, and transportation.

Certifications and Recognitions

• ISO 9001:2015
• ISO 14001:2015
• OHSAS 18001:2007

Key Strengths

• Integration of advanced manufacturing technologies.
• Robust quality control systems ensure product reliability.
• Experience in handling large-scale projects with complex requirements.

#5. Shanghai Jianxin Hardware Co., Ltd

Year Founded/Established: 2001

Headquarters: Shanghai, China

Shanghai Jianxin Hardware specializes in the production of various fasteners, with a strong emphasis on carriage bolts. 

The company is recognized for its commitment to quality and customer satisfaction, offering products that meet international standards.

Certifications and Recognitions

• ISO 9001:2015

Key Strengths

• Flexibility in manufacturing both standard and custom fasteners.
• Adoption of environmentally friendly production processes.
• Dedicated customer support team providing responsive service.

Additional Considerations When Choosing a Carriage Bolt Manufacturer

Beyond evaluating individual manufacturers, it’s essential to consider the following factors to ensure a successful partnership:

Quality Assurance

Ensure the manufacturer has robust quality control processes, including material testing and dimensional inspections, to guarantee product reliability.

Technical Support

A manufacturer with a knowledgeable technical team can assist in selecting the appropriate fasteners for specific applications and provide guidance on installation best practices.

Logistics and Delivery

\Consider the manufacturer’s ability to deliver products within the required timelines, especially for large-scale projects or time-sensitive orders.

After-Sales Service

Responsive after-sales support is crucial for addressing any issues that may arise post-delivery, including product replacements or technical assistance.

Why are Carriage Bolts Important?

Carriage bolts play a crucial role in fastening applications that require a secure, tamper-resistant connection. 

Their unique design, featuring a domed head and a square neck, prevents rotation during installation, making them ideal for wood, metal, and plastic assemblies. 

This design ensures a tight, durable connection while minimizing the risk of loosening over time.

Carriage bolts are commonly used in construction, furniture assembly, and outdoor structures like fences and decks due to their ability to provide strong, flush finishes. 

Their corrosion-resistant coatings, such as zinc or stainless steel, make them suitable for harsh environments, ensuring long-term reliability in various industrial and commercial settings.

How to Choose the Right Carriage Bolt for Your Application

Selecting the right carriage bolt depends on factors such as material, size, and coating. 

Stainless steel carriage bolts are ideal for outdoor and marine applications due to their corrosion resistance, while zinc-plated options provide cost-effective rust protection for indoor use.

The correct carriage bolt fastener size depends on the thickness of the materials being joined. 

Standard sizes range from M6 to M16 in metric measurements or 1/4” to 3/4” in imperial units. 

Additionally, consider the thread type—fully threaded bolts offer maximum grip, while partially threaded options provide additional shear strength.

Carriage Bolt Suppliers: Conclusion

Selecting the right carriage bolt supplier is pivotal for ensuring the integrity and durability of your projects. 

The manufacturers highlighted above—CNRL Fasteners, Yijin Hardware Co., Ltd, Handan Zhongpin Fasteners, Shanghai Prime Machinery Co., Ltd, and Shanghai Jianxin Hardware Co., Ltd—are distinguished by their commitment to quality, innovation, and customer satisfaction. 

By carefully assessing your specific requirements and considering the strengths of each manufacturer, you can establish a partnership that aligns with your project’s goals and standards.