What products does Youlong manufacture?

Youlong manufactures photovoltaic mounting components such as aluminum guide rails, water channels, angle brackets and connectors, plus precision fasteners including anchor bolts, carriage bolts, expansion bolts, flat washers and wing nuts for solar, wind power and construction projects.

Can you produce custom PV brackets and fasteners to my drawings?

Yes. Our automated stamping, forging and CNC machining lines support OEM and custom production. Send drawings or samples with material, finish and quantity requirements, and our engineers will confirm feasibility, tolerances and a written proposal.

How do you control the quality of fasteners for outdoor solar projects?

We run random inspections from raw material intake to final dispatch and test against industry standards, including salt spray corrosion testing and tensile strength testing, so that hardware performs reliably in long-term outdoor exposure.

Which material should I choose for coastal or high-humidity PV sites?

For coastal, offshore or industrial sites with high corrosion categories, stainless steel grade 316 (A4) fasteners are generally recommended. For inland sites, 304 (A2) stainless or hot-dip galvanized carbon steel is commonly specified. Isolating washers help prevent galvanic corrosion between aluminum rails and steel hardware.

Where is Youlong located and do you export worldwide?

Youlong is located in Yongnian District, Handan City, Hebei Province, known as China's Fastener Capital. We have served more than 100 clients worldwide with cumulative shipments exceeding 300,000 tonnes.

Buy High-Quality Stainless Steel Carriage Bolt Suppliers in China - Durable Factory Direct Fasteners for Construction Supplier, Factory

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Buy High-Quality Stainless Steel Carriage Bolt Suppliers in China - Durable Factory Direct Fasteners for Construction Supplier, Factory

Introducing our high-quality stainless steel carriage bolts, expertly crafted in China by leading suppliers and manufacturers. These bolts feature a round head square neck design, ensuring anti-rotation and anti-loosening benefits, along with superior corrosion resistance. Made from premium 304/316 stainless steel, each bolt is engineered with precise threads and a smooth finish, making them ideal for various applications including mechanical projects, construction, and furniture fixing. Experience stable connections, effortless installation, and an extended service life, suitable for both indoor and outdoor environments. Trust our factory to provide reliable fastening solutions that meet your needs

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Product Description

Product Application

Widely used for fixed connection in construction engineering, mechanical equipment, furniture assembly, shipbuilding and outdoor hardware installation scenarios.

Suitable for fastening wooden components, metal profiles, plastic parts and sheet materials, realizing anti-rotation and firm fixing of connected parts.

Compatible with standard mounting holes, nuts and washers, matching various fastening structures and meeting daily industrial and civilian fixing needs.

Adaptable to indoor and outdoor environments including coastal, humid, high-cold and mildly corrosive areas, maintaining stable performance for a long time.

Ideal for equipment maintenance, engineering renovation and daily hardware replacement, providing reliable fastening support for various projects.

Material & Processing Features

Made of high-grade 304 or 316 stainless steel, with excellent rust resistance, salt spray resistance and corrosion resistance, suitable for long-term use in harsh environments.

Adopts precision cold heading and threading process, with smooth round head, standard square neck and neat, precise threads, ensuring tight fit and stable anti-rotation effect.

Unique round head square neck structure prevents bolt rotation during tightening, enabling quick and convenient installation without slipping.

Strict dimensional tolerance control ensures uniform product specifications, easy to match with standard fasteners for stable and reliable connection.

Passivation surface treatment enhances surface hardness and wear resistance, avoiding rust, deformation and damage under long-term use and extreme weather.

Core Product Benefits

Anti-rotation square neck design effectively prevents loosening caused by vibration and external force, ensuring long-term stability of fastened components.

High-strength stainless steel material provides excellent tensile and shear resistance, meeting the fastening safety requirements of various engineering projects.

Complete specifications and customizable length options, adapting to different thicknesses of connected parts and diverse installation requirements.

Simple installation and disassembly process, no special tools required, reducing construction difficulty and later maintenance costs.

Comply with international fastener standards, passing tensile test, salt spray test and hardness test, with stable quality and reliable performance.

Wide applicability and strong versatility, suitable for industrial manufacturing, construction, furniture and outdoor hardware fields, cost-effective and durable.

Detail Pictures

Frequently Asked Questions

Q1 What are the primary applications for these carriage bolts?

They are widely used in construction, furniture assembly, shipbuilding, and outdoor hardware for fastening wood, metal, and plastic components securely.

Q2 Why is the square neck design beneficial?

The square neck fits into a pre-drilled hole and prevents the bolt from rotating while the nut is being tightened, allowing for easy one-sided installation.

Q3 Are these bolts resistant to rust in coastal areas?

Yes, being made of high-grade 304 or 316 stainless steel, they offer excellent corrosion and salt spray resistance, making them ideal for humid and coastal environments.

Q4 Do I need special tools for installation?

No special tools are required. A standard wrench or socket set is sufficient to tighten the nut onto the bolt.

Q5 Can the length of the bolts be customized?

Yes, we offer complete specifications and customizable length options to adapt to different thicknesses and specific project requirements.

Q6 Do your products meet international quality standards?

Absolutely. Our fasteners comply with international standards and undergo rigorous tensile, salt spray, and hardness testing to ensure reliable performance.

Buy High-Quality Stainless Steel Carriage Bolt Suppliers in China - Durable Factory Direct Fasteners for Construction Supplier, Factory

Product Description

Product Application

Material & Processing Features

Core Product Benefits

Detail Pictures

Frequently Asked Questions

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