Common Applications of Carriage Bolts – Where and How They’re Used
Carriage bolts are a go-to fastener for a wide range of structural and assembly tasks, thanks to their smooth, rounded head and square neck that resists spinning once set. From woodworking to heavy-duty outdoor structures, their versatility makes them a preferred choice for builders, manufacturers, and DIYers alike.
As a professional wing nut supplier, XINCHI is glad to share the most common carriage bolt applications, along with tips on how to use them correctly for maximum strength and durability.
Wood-to-Wood Connections in Carpentry – Classic Carriage Bolt Applications
One of the most traditional uses of carriage bolts is in woodworking, particularly for joining wood to wood. The square neck fits into a pre-drilled hole and locks into place when tightened, preventing rotation.
Common carpentry uses include:
- Securing timber beams and wooden frames
- Constructing rafters or pergola joints
- Assembling furniture and garden structures
Their flush appearance and mechanical hold make them ideal for visible and load-bearing wooden structures.
Outdoor Applications – Carriage Bolts for Furniture, Fencing, and Decking
Thanks to their corrosion-resistant options (such as zinc-plated or stainless steel), carriage bolts are well-suited for outdoor installations. They offer both strength and clean aesthetics, making them perfect for:
- Assembling patio furniture or benches
- Fixing fence panels, posts, and gates
- Securing deck frames and supports
In these environments, choosing rust-resistant materials is critical for long-term durability.
Playground Equipment, Farm Machinery, and Bridge Railings – Heavy-Duty Use of Carriage Bolts
Carriage bolts are also commonly used in more demanding, heavy-duty applications where safety and stability are essential.
Typical examples include:
- Connecting parts of the playground climbing structures
- Securing components in agricultural equipment
- Mounting guardrails or signposts on bridges and roads
In these use cases, carriage bolts are often paired with lock nuts and large washers to absorb vibration and prevent loosening over time.
How to Use Carriage Bolts with Washers and Nuts – Best Practice Tips
To ensure a strong and secure installation, carriage bolts are typically used together with:
- Flat washers: Help distribute load and prevent surface damage
- Lock washers: Provide extra resistance against loosening from vibration
- Hex nuts or flange nuts: Secure the threaded end with the right torque
For softwood or thin sheet metal, it’s advisable to drill pilot holes and use washers on both sides to prevent pull-through or surface splitting.
Looking for Reliable Carriage Bolts?
At Xinchi Fasteners, we specialize in producing high-quality carriage bolts in a wide range of sizes, materials, and finishes. Whether you need carbon steel, stainless steel (304/316), or corrosion-resistant coatings like zinc plating or hot-dip galvanizing, we’ve got you covered.
Why choose Xinchi Fasteners?
- Factory Direct Supply: We are a professional manufacturer with competitive pricing and stable lead times.
- Custom Solutions: We support OEM & ODM services to meet specific project requirements.
- Strict Quality Control: All products go through multi-step inspections, including thread tolerance, coating thickness, and pull-out testing.
- Global Shipping: We have experience serving clients across Europe, North America, Southeast Asia, and the Middle East.
- Fast Response & Support: Our English-speaking sales team provides quick quotes and technical assistance.
XINCHI is a trustworthy fastener company, especially in furniture nuts. We have a factory, founded in 2007. We are the designated fastener supplier to“STAPLE”. As a trusted fastener supplier, XINCHI offers a wide range of high-quality fasteners, including nuts, screws, bolts, rivets, and washers. If you would like to learn more about fasteners or are interested in wholesale fasteners, please do not hesitate to contact us. Our experienced and expert service team will reply as soon as possible.
Whether you’re sourcing for furniture manufacturing, construction, agriculture, or OEM hardware distribution, Xinchi Fasteners is your trusted partner for durable, cost-effective, and customizable fastening solutions.