Carriage Bolts_.

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Carriage bolts, also known as coach bolts, are a type of fastener commonly used in woodworking, metalworking, and construction. These bolts are known for their unique head shape and are often used in applications where a smooth finish is desired on the exposed side of the joint. In this article, we will discuss the different types of carriage bolts, their importance, and tips for purchasing them.

Types of Carriage Bolts

There are several types of carriage bolts available, which vary in size, material, and head design. Here are some of the common types:

• Standard Carriage Bolts: These are the most commonly used carriage bolts and have a round, domed head and a square neck beneath the head. They are available in a variety of sizes and materials, including low-carbon steel, stainless steel, and brass.
• Mushroom Head Carriage Bolts: These carriage bolts have a larger, more rounded head than standard carriage bolts, giving them a mushroom-like appearance. They are often used in furniture and decorative applications.
• Flange Head Carriage Bolts: These carriage bolts have a large, flat flange beneath the head that provides a wider bearing surface. They are often used in applications where a greater load-carrying capacity is required.
• Plow Bolts: These are similar to carriage bolts, but have a flat countersunk head and a square neck. They are commonly used in heavy-duty applications, such as in agricultural machinery or mining equipment.
• Timber Bolts: These are large, heavy-duty carriage bolts that are specifically designed for use in wood. They have a long shank and a large, flat head that distributes the load across a larger area.
• Shoulder Bolts: These are carriage bolts with a threaded shoulder beneath the head that provides a precise mating surface for a nut or other threaded component. They are commonly used in precision machinery applications.

Importance of Carriage Bolts

Carriage bolts are important for several reasons. First, they are designed to be used in applications where a smooth finish is desired on the exposed side of the joint. This makes them ideal for use in furniture making, cabinetry, and other applications where aesthetics are important.

Second, carriage bolts are designed to be used in applications where the joint is under tension. The square neck of the bolt helps prevent it from spinning when tightened, making it ideal for use in wooden structures such as decks and fences.

Finally, carriage bolts are an important component in the construction of many different types of buildings and structures. They are used to fasten metal plates to wooden beams, to attach metal brackets to wooden posts, and secure wooden framing members together.

Tips for Purchasing Carriage Bolts

When purchasing carriage bolts, there are several things to consider to ensure that you get the right bolt for your application. Here are some tips to help you make the right choice:

• Material - Consider the material of the carriage bolt that you need. If you require a bolt that is resistant to corrosion, then stainless steel carriage bolts are a great choice. However, if you are using the bolt in a non-corrosive environment, then a low-carbon steel bolt with a zinc coating will work well.
• Size - Consider the size of the carriage bolt that you need. The size of the bolt will depend on the thickness of the material being fastened. Make sure to measure the thickness of the material accurately to ensure that you get the right size bolt.
• Length - Consider the length of the carriage bolt that you need. The length of the bolt is measured from the top of the head to the end of the shank. Make sure to measure the thickness of the material accurately to ensure that you get the right length bolt.
• Thread - Consider the thread of the carriage bolt that you need. The thread is part of the bolt that goes through the material and is threaded to allow for the nut to be screwed onto it. Make sure to get a bolt with the correct thread size and pitch for your application.

FAQs

Q1.  What is a carriage bolt?

Ans: A carriage bolt, also known as a coach bolt, is a type of fastener with a round, domed head and a square neck beneath the head. The square neck prevents the bolt from turning when the nut is tightened, making it ideal for use in wooden structures.

Q2. What are carriage screws used for?

Ans: Carriage bolts or carriage screws are commonly used in woodworking, metalworking, and construction applications. They are used to fasten metal plates to wooden beams, attach metal brackets to wooden posts, and secure wooden framing members together.

Q3. What are the different types of carriage bolts?

Ans: Carriage bolts are available in a variety of materials, including low-carbon steel, stainless steel, and brass. They also come in different sizes, ranging from ¼ inch to 1 inch in diameter. Additionally, there are square neck carriage bolts that are commonly used in wooden structures such as decks and fences.

Q4. What is the length of a carriage bolt?

Ans: The length of a carriage bolt is measured from the top of the head to the end of the shank. The shank is part of the bolt that goes through the material and is threaded to allow for the nut to be screwed onto it.

Q5. What is the thread of a carriage bolt?

Ans: The thread is part of the bolt that goes through the material and is threaded to allow for the nut to be screwed onto it. The thread size and pitch of a carriage bolt will depend on the size and application of the bolt.

Q6. What are the benefits of using carriage bolts?

Ans: Carriage bolts are designed to be used in applications where a smooth finish is desired on the exposed side of the joint. They are also designed to be used in applications where the joint is under tension, as the square neck helps prevent the bolt from spinning when tightened.

Q7. What is the difference between a standard carriage bolt and a square neck carriage bolt?

Ans: The difference between a standard carriage bolt and a square neck carriage bolt is that the square neck carriage bolt has a square neck that helps prevent the bolt from spinning when tightened. This makes it ideal for use in wooden structures such as decks and fences.

Q8.  How do I choose the right carriage bolt for my application?

Ans: When choosing a carriage bolt, consider the material, size, length, thread, and whether you need a standard or square neck carriage bolt. Make sure to accurately measure the thickness of the material being fastened and choose a bolt that is appropriate for the load and tension requirements of the application.

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