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

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Our Steel Carriage Bolt – Strong for Heavy-Duty Fastening

We manufacture steel carriage bolts made from high-strength steel, ideal for heavy-duty fastening in construction, machinery, and outdoor projects. They feature a square neck that prevents spinning and a threaded shank that pairs with carriage nuts for secure hold. The steel construction withstands high loads and vibration, making them suitable for beams, frames, or equipment. Available in various lengths, these bolts are a reliable choice for projects needing maximum strength.
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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

Steel carriage bolts are a fundamental type of fastener widely used in various industries and applications due to their strength, durability, and versatility. Made from high - quality steel, these bolts are designed to withstand significant loads and stresses, making them suitable for both light - duty and heavy - duty projects. The key feature of steel carriage bolts is their square - shaped shoulder under the head. This unique design prevents the bolt from rotating when tightened, providing a stable and secure connection. In construction projects, steel carriage bolts are commonly used to fasten wooden structures, such as decks, fences, and pergolas. For example, when building a wooden deck, these bolts can be used to connect the beams and joists, ensuring that the deck remains stable and safe for use. In the manufacturing industry, steel carriage bolts are essential for assembling machinery and equipment. They are used to secure various components together, such as frames, panels, and brackets, providing the necessary strength and rigidity to withstand the operational forces. The high - strength steel construction of these bolts ensures that they can handle the vibrations and stresses generated during the operation of the machinery. Steel carriage bolts are available in a variety of sizes and grades to meet different application requirements. The size of the bolt is determined by its diameter and length, and it is important to choose the right size based on the thickness of the materials being fastened and the expected load. The grade of the steel indicates its strength and hardness, with higher - grade bolts being suitable for more demanding applications. When installing steel carriage bolts, it is recommended to use the appropriate nuts, such as carriage nuts or hex nuts, and to follow the manufacturer's installation instructions. Regular inspection and maintenance are also important to check for any signs of corrosion or loosening, especially in outdoor or harsh environments. If you need more information about steel carriage bolts or would like to discuss your specific project needs, please contact us.

Frequently Asked Questions

Can Zhongsheng’s rubber washers withstand harsh conditions?

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.
Our felt pads prevent scratches, reduce noise, and anti-slip. Self-adhesive for easy installation, fitting furniture feet (chairs, tables), with thicknesses for heavy/light use, durable for long protection.

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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.