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The Uses Of Carriage Bolts

Carriage bolts are a type of fastener with a special structure, featuring a round or square head (round is more common), a flat top and smooth edges, and a threaded shank. Their overall design allows them to play a unique role in specific scenarios. Here are their main uses and characteristics:

### I. **Fixing wooden structures**

This is the most traditional and common use of carriage bolts:

- In wood connections (such as furniture making, log cabin construction, and wooden frame assembly), their round heads can be embedded into the wood surface, avoiding protruding bolt heads from scratching objects or people. At the same time, they provide a large bearing area to prevent wood from cracking under pressure.

- For example, the connection between the carriage body and frame of wooden carriages, the fixing of wooden floors, etc., often use carriage bolts.

### II. **Fixing metal sheets or profiles**

In the connection of metal components, carriage bolts are suitable for the following scenarios:

- When the connecting surface needs to remain flat and free of protrusions (such as equipment enclosures, metal panels), their smooth heads can fit tightly against the surface, reducing the risk of collision. They can also be fastened from the other side with nuts to ensure a firm connection.

- They are often used in the assembly of metal frames, guardrails, billboard brackets, etc., especially suitable for connecting thin plates to thick plates or profiles.

### III. **Installation of outdoor and heavy-duty equipment**

- Since carriage bolts are usually made of high-strength steel (such as grade 8.8, 10.9), and their head design can withstand large lateral forces, they are suitable for fixing outdoor heavy-duty equipment (such as agricultural machinery, engineering machinery, and storage shelves). They can resist external forces such as vibration and impact, ensuring the stability of the connection.

### IV. **Scenarios with high decorative or safety requirements**

- In structures with aesthetic requirements (such as furniture, display racks), their flat heads can be flush with the surface, enhancing the appearance;

- In areas with frequent human activities (such as children's playground facilities, handrails), the smooth heads can avoid hooking clothes or causing scratches, improving safety.

### Summary

The core advantages of carriage bolts lie in their **flat and smooth heads, large bearing area, and reliable fastening**. Therefore, they are widely used in scenarios that require a balance of connection strength, surface flatness, and safety, especially excelling in the connection of wooden and metal structures.