Heavy-Duty Carriage Bolts | Anti-Corrosion & Custom Sizes

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Our Carriage Bolts – Versatile for Multiple Applications

We offer carriage bolts that are versatile for multiple uses—door/window installation, outdoor furniture, construction, machinery, and more. They feature a square neck for anti-spin stability and a rounded head for either visible or concealed fastening. Made from durable, weather-resistant materials, they adapt to indoor or outdoor environments, holding securely in wood, metal, or concrete. Paired with our carriage nuts and washers, these bolts provide a reliable fastening solution for any project requiring strength and stability.
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Why choose us?

High - Strength Carriage Bolts for Heavy - Duty Projects

Our carriage bolts are engineered for heavy - duty applications in construction, machinery, and outdoor projects. The square neck design prevents the bolt from rotating during installation, making the fastening process more efficient. Made from high - strength steel, they can withstand significant loads and vibrations. We offer a variety of sizes and finishes, including galvanized and stainless steel options for enhanced corrosion resistance. With our extensive industry knowledge and professional manufacturing process, you can rely on our carriage bolts for your most demanding projects.

Size - Customizable Carriage Bolts for Specific Projects

We recognize that not all projects can be completed with standard - sized carriage bolts. That's why we offer size - customizable carriage bolts. Our professional team can work with you to determine the exact length, diameter, and thread pitch you need for your specific project. Whether it's a unique construction project or a custom - made piece of machinery, our customizable carriage bolts can provide the perfect fit. With our advanced manufacturing capabilities and 30 - year history, we can produce high - quality, customized carriage bolts efficiently.

Anti - Corrosion Coated Carriage Bolts for Outdoor Use

For outdoor projects, our anti - corrosion coated carriage bolts are a great choice. These bolts are coated with a special layer that protects them from rust and corrosion caused by rain, snow, and humidity. Whether you're building a deck, a fence, or an outdoor furniture set, our anti - corrosion carriage bolts will maintain their strength and appearance over time. With our 30 - year experience in hardware manufacturing, we ensure that the coating is evenly applied and adheres firmly, providing long - lasting protection against the elements.

Related products

Carriage bolts have a wide range of uses across various industries and applications due to their unique design and functional advantages. Their square - shaped shoulder under the head, which prevents rotation when tightened, makes them an ideal choice for creating secure and stable connections. In the construction industry, carriage bolts are commonly used in wood - to - wood and wood - to - metal connections. For example, when building a wooden deck, carriage bolts can be used to attach the beams to the posts, providing a strong and durable connection that can withstand the weight of people and furniture. In the assembly of metal structures, such as steel frames for buildings or bridges, carriage bolts are used to connect the different components together, ensuring the structural integrity of the project. In the automotive industry, carriage bolts play a crucial role in the assembly of vehicle components. They are used to secure engine mounts, suspension parts, and body panels, providing a reliable connection that can handle the vibrations and stresses of driving. The corrosion - resistant versions of carriage bolts, such as stainless steel or galvanized bolts, are often used in automotive applications to protect against rust and corrosion caused by exposure to road salt and moisture. In the furniture manufacturing industry, carriage bolts are used to assemble various types of furniture, including beds, tables, and chairs. The square - shaped shoulder of the bolt ensures that the furniture remains stable and does not wobble, providing a safe and comfortable user experience. The aesthetic appeal of carriage bolts can also be enhanced by choosing bolts with decorative finishes, such as brass or antique - style coatings, to match the design of the furniture. In addition to these industries, carriage bolts are also used in DIY projects, agricultural applications, and marine construction. Their versatility and reliability make them a popular choice for anyone looking to create a strong and secure connection. If you have a specific application in mind and would like to learn more about how carriage bolts can be used, please contact us for expert advice.

Frequently Asked Questions

What materials are Zhongsheng’s copper washers made of?

Our copper washers use high-purity copper, offering good conductivity and corrosion resistance. Ideal for plumbing (sealing) and electrical connections, they distribute pressure evenly, lasting long per our 30-year quality standard.
Yes, our rubber washers use elastomers (silicone, nitrile) resisting high/low temps, chemicals, and moisture. They seal leak-proof for plumbing/automotive/industrial use, with customization available for specific conditions.
Our screw assortment has various screws (wood, sheet metal, machine) in sizes/materials, packed in organized plastic boxes. It covers most DIY needs (furniture, repairs), saving time on sourcing individual screws.
Yes, our cable ties are versatile. UV-resistant for outdoor (garden cables), reusable/flame-retardant for indoor (electrical). Sizes fit different bundle weights, meeting home/industrial needs.

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Customer Reviews

Linda Scott
Reliable Carriage Bolts for Gate Installation

I installed a new gate in my backyard, and these carriage bolts worked perfectly. The bolts are sturdy, and they hold the gate hinges securely, so the gate doesn’t sag. The threads are smooth, making it easy to tighten the nuts, and the finish matches the gate’s hardware. The PP box packaging was durable, keeping the bolts safe during installation. The price is affordable, and the quality is as good as more expensive brands. I recommend them for any gate or fence project.

Susan King
Easy-to-Install Carriage Bolts for Furniture Assembly

I used these carriage bolts to assemble a heavy wooden workbench, and they were easy to install. The rounded head gives the workbench a clean look, and the square neck keeps the bolts in place while tightening the nuts. The bolts are strong, and the workbench is very stable. The PS plastic-absorbing box had all the sizes I needed, and the instructions were simple to follow. For a DIY furniture project, these bolts are perfect— strong, easy to use, and affordable.

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Why Our Carriage Bolts? Heavy-Duty & Weather-Resistant

Why Our Carriage Bolts? Heavy-Duty & Weather-Resistant

Ideal for decks, fences, or machinery, our carriage bolts have anti-spin necks, corrosion-resistant coatings, and come in plastic-absorbing boxes. We offer quality at good prices and custom sizes. With 30 years of experience, we’re trusted by foreign firms. Contact us now for more on your heavy-duty needs.