Finding a qualified manufacturer in China isn’t easy—even if you’ve been in this game for years. With over 15 years in the fastener industry, I’ve visited factories, dealt with tough custom specs, and negotiated countless contracts. I’ve also helped hundreds of buyers like you avoid poor-quality suppliers.
So, I rolled up my sleeves and spent over 4 hours combing through the best square head bolt makers in China.
This list? It’s built from hands-on experience, real customer feedback, and trusted data—not just Google rankings.
Summary Table: Square Head Bolt Manufacturers in China
| Rank | Company Name | Established | Location | Main Products |
|---|---|---|---|---|
| 1 | Shanghai Hengrui Industry Co., Ltd. | 2021 | Shanghai | Square Head Bolt, bolts, Screw, nuts, washers, machining & stamping parts |
| 2 | Aozhan Industrial Co., Ltd | 2005 | Hangzhou | Stainless steel Square Head Bolt, precision bolts & nuts |
| 3 | Yijin Hardware Co., Ltd | 2003 | Shenzhen | Square Head Bolt, hex bolts, nuts |
| 4 | Shanghai Jianxin Hardware Co., Ltd | 2001 | Shanghai | Square Head Bolt, flange nuts, mechanical screws |
| 5 | Jiaxing Qimu Trading Co., Ltd | ~2004 | Jiaxing | Square Head Bolt, bolts, nuts |
| 6 | Ningbo OuKaiLuo Hardware Co., Ltd | 1999 | Ningbo | Stainless steel Square Head Bolt, screws, nuts |
| 7 | Dongguan Roche Industrial Co., Ltd | 2006 | Dongguan | Square Head Bolt, mechanical screws |
| 8 | Handan Zhongpin Fasteners Manufacturing | 1987 | Handan | High-strength Square Head Bolt & bolts |
| 9 | Tianjin Xinruifeng Technology Co., Ltd | 2008 | Tianjin | Square Head Bolt, custom fasteners |
| 10 | Shanghai Prime Machinery Co., Ltd | 2005 | Shanghai | Square Head Bolt, mechanical fasteners |
1. Shanghai Hengrui Industry Co., Ltd
Company Overview: Shanghai Hengrui Industry Co., Ltd focuses on both standard and non-standard fasteners, offering tailored OEM solutions backed by over 15 years of industry expertise.
Established: 2021
Location: Minhang District, Shanghai, China
Main Products: square head bolts, bolts, Screw, nuts, washers, and custom fasteners, machined parts, stamping parts
Shanghai Hengrui Industry Co., Ltd has quickly built a strong reputation in the fastener world. With a modern factory setup, five production lines, and a dedicated technical team, Hengrui provides flexible solutions for a wide range of industries—from automotive to wind energy.
We’re not just a supplier. We’re your project partner. Our fasteners meet international standards like DIN, ISO, ASTM, IFI, and are supported with full QC reports and third-party testing if needed. From small-batch prototyping to high-volume orders, Hengrui ensures on-time delivery, competitive pricing, and technical support every step of the way.
2. Aozhan Industrial Co., Ltd
Company Overview: Aozhan focuses on precision fasteners and has established itself as a reliable supplier with a commitment to quality manufacturing processes.
Established: 2005
Location: Hangzhou City, Zhejiang Province, China
Main Products: Precision stainless steel square head bolts, screws, nuts, and stainless steel wire.
Aozhan has been a trusted name in the fastener industry since 2005. With a focus on both standard and custom stainless steel fasteners, they serve demanding sectors like aerospace, mechanical, and automotive industries. Their advanced equipment and strict quality control systems ensure each piece meets precision expectations.
Whether you need precision square bolts or high-grade stainless steel fasteners, Aozhan delivers reliability with every order. Their R&D team is responsive to customization needs, offering flexibility and consistency.
3. Yijin Hardware Co., Ltd
Company Overview: Yijin Hardware focuses on building-quality fasteners with an emphasis on consistency and global customer service.
Established: 2003
Location: Shenzhen City, China
Main Products: Square head bolts, hex bolts, nuts, and other standard fasteners.
Yijin Hardware has been producing high-quality fasteners for over two decades. Their products are widely used in construction, machinery, and automotive sectors. With a production team of over 200 and years of export experience, they know how to handle large-scale international projects.
Their strength? Customer service and stability. Yijin is a solid choice if you’re looking for long-term cooperation, predictable quality, and factory-direct support.
4. Shanghai Jianxin Hardware Co., Ltd
Company Overview: Jianxin specializes in high-precision fasteners with a focus on strength and strict industry compliance.
Established: 2001
Location: Shanghai City, China
Main Products: Square head bolts, flange nuts, mechanical screws.
Jianxin stands out for serving over 200 clients globally, exporting to more than 50 countries. With a deep understanding of technical requirements, especially for nuclear power and high-strength applications, they deliver dependable, high-spec fasteners.
Their facilities are equipped with state-of-the-art testing machines, ensuring strict product inspection and performance reliability. A strong option for projects requiring detailed compliance and certifications.
5. Jiaxing Qimu Trading Co., Ltd
Company Overview: Qimu specializes in large-scale fastener production and exports with a focus on efficiency and volume.
Established: ~2004
Location: Jiaxing City, China
Main Products: Square head bolts, nuts, and general fasteners.
With a staggering annual capacity of 25,000 tons, Qimu is a powerhouse in mass production. Their focus is on mechanical and construction-grade fasteners, delivered in high volumes.
Distributors and big buyers appreciate their bulk pricing and standardized product lines. They’re ideal for customers looking for a high-capacity partner with a reliable export operation.
6. Ningbo OuKaiLuo Hardware Co., Ltd
Company Overview: OuKaiLuo focuses on stainless steel fasteners and continuous innovation in manufacturing technologies.
Established: 1999
Location: Ningbo City, China
Main Products: Square head bolts, nuts, screws.
OuKaiLuo brings over two decades of fastener manufacturing experience, with a strong emphasis on export-grade stainless steel components. Known for quality consistency and responsive service, they’re a go-to supplier for buyers in Europe and the U.S.
They blend traditional know-how with a modern quality system, making them a solid match for projects needing corrosion-resistant or stainless steel solutions.
7. Dongguan Roche Industrial Co., Ltd
Company Overview: Roche focuses on high-performance fasteners with a specialization in automotive and machinery industries.
Established: 2006
Location: Dongguan City, China
Main Products: Square head bolts, mechanical screws.
Roche is all about precision and efficiency. With an agile production team and mid-size factory strength, they support OEM automotive clients and equipment manufacturers.
They offer customization support, and their quick lead times make them attractive for clients working under tight schedules.
8. Handan Zhongpin Fasteners Manufacturing Co., Ltd
Company Overview: Zhongpin focuses on high-strength fasteners for heavy industry and construction applications.
Established: 1987
Location: Handan City, Hebei Province, China
Main Products: Square head bolts, high-strength bolts.
Zhongpin is one of the oldest players on this list. Their specialization in high-strength bolts and threaded rods makes them the top choice for infrastructure, wind power, and oil & gas projects.
With a team of over 180 and decades of technical experience, they provide the muscle behind some of China’s toughest builds.
9. Tianjin Xinruifeng Technology Co., Ltd
Company Overview: Xinruifeng focuses on fastener innovation and responsive delivery.
Established: 2008
Location: Tianjin City, China
Main Products: Square head bolts, custom fasteners.
Xinruifeng combines mid-size agility with technical ambition. Their products are well received in both the domestic and overseas markets. For buyers looking for a balanced approach—reasonable lead times, good pricing, and custom capability—Xinruifeng is a top pick.
They continue to invest in R&D and expand their export portfolio, especially in Southeast Asia and Europe.
10. Shanghai Prime Machinery Co., Ltd
Company Overview: Shanghai Prime focuses on mechanical fasteners and large-scale project supply.
Established: 2005
Location: Shanghai City, China
Main Products: Square head bolts, mechanical fasteners.
Shanghai Prime services major industrial clients and public infrastructure projects. Their square head bolts and bolts are known for structural strength and material consistency.
They offer strong technical backing and meet international compliance standards, making them a safe bet for large-scale, deadline-driven work.
FAQ: Square Head Bolt Sourcing from China
Q1: How do I choose the right square head bolt supplier in China?
A: Check their production experience, quality certifications (like ISO, IFI), and whether they support non-standard customization. Communication fluency and export experience also matter.
Q2: What materials are commonly used for square head bolts?
A: Common materials include carbon steel, alloy steel, stainless steel (304/316), and brass. The material depends on your corrosion and strength requirements.
Q3: Can square head bolts be customized?
A: Yes. Factories like Hengrui can customize dimensions, thread types, coatings, and even packaging—based on your drawings or samples.
Q4: What surface treatments are available for square bolts?
A: Zinc plating, hot-dip galvanized (HDG), black oxide, Dacromet, nickel, and Magni are commonly used.
Q5: What’s the usual lead time for square head bolts?
A: For standard sizes: around 25–30 days. For custom designs: expect 35–50 days depending on specs.
Conclusion
Sourcing square head bolts from China can be simple—if you know where to look. This guide introduced 10 trusted manufacturers, each with their own strengths. Whether you’re after stainless steel precision parts, high-strength structural bolts, or bulk volumes at competitive prices, there’s a supplier on this list that fits your needs.
Contact Hengrui Fastener for Custom Square Head bolts
For specialized applications that require custom solutions, Hengrui Fastener offers high-quality, customizable square head bolts and fasteners. Whether you need a specific size, material, or finish, Hengrui can provide tailored fasteners to meet your exact requirements. Visit Hengrui Fastener to learn more about our products and services.
