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Everything You Need to Know About Carriage Bolts

Pulished on Sep. 18, 2021

Carriage Bolts


The carriage bolt is a unique bolt that comes with a mushroom head and a round shank cross-section. However, the part directly below the mushroom head forms a square part. The head is usually shallow and dome-shaped. The square part has an ordinary unthreaded shank with the same diameter as the bolt shank’s diameter.


What are they used for?

Carriage bolts are used to fix wood with wood, wood with metal, and even metal with metal. Its special shape allows bolts to be self-locking when placed through square holes, especially when handling metal. Or, it can also be easily placed in most kinds of wood through a round hole, making it a versatile accessory.


Where do carriage bolts get their name from?

Carriage bolts have existed for centuries. In the early 19th century, they became popular because they were widely used in the construction of carriages and wheels, so they were named carriage bolts.


What are the modern applications of carriage bolts?

The most common modern applications of carriage bolts are carpentry and wooden structures. They are often used by homeowners and also by professional carpenters for DIY projects, home maintenance, and repairs.


Why use carriage bolts?

Carriage bolts are commonly used because they are easy to use, especially when dealing with wood. Their smooth domed heads provide aesthetic appeal and a certain degree of safety when building wooden decks, decorative fences, wooden furniture, and backyard play equipment. In addition to safety, carriage bolts also provide safety because they can only be opened from one side. They can be used in fixing doors to prevent unscrewing from the wrong side.


How much weight can a carriage bolt bear?

The carriage bolts are easy to install and usually require a single tool to operate. Having said that, once installed, they can hold large amounts of weight.


When to use carriage bolts?

The best place to use carriage bolts is when you want to connect the elements together to have a strong grip.

This type of bolt is specially designed to work on the wood surface and give a stable connection for wood craftsmen.


How to fasten carriage bolts in wood?

The special carriage bolt has a square shoulder at the bottom of the dome head. Therefore, it is best to tighten the bolts with a wrench.

In this way, the bolt will not rotate, it will give a stronger hold on the wood surface. It is usually recommended to use this type of bolt to fix the cork.

The carriage bolts give the fastest hold on the wood panels and can also be installed easily.

Therefore, follow a step-by-step process to ensure a perfect connection and understand the fact that the carriage bolts use it.

Because collecting knowledge about things before using it helps to get appropriate results out of them.


How to countersink a carriage bolt?

Sometimes, many element connections require sinking.

Countersink may sound like a word from all over the world, but it is about kneeling on a carriage bolt into the surface without letting the head dome rest on the surface.

In order to do this, a larger hole must be cut in the surface to fit the head dome of the carriage bolt, and then the bolt must be installed in the manner specified above.

The interaction of the bolt with skin will be less, and there will be less chance to occur accidents due to the dome of the bolt's head.


We are a carriage bolt supplier. Please feel free to contact us if you need to know about our products.

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