Everything you need to know about stainless steel carriage bolts

Everything you need to know about stainless steel carriage bolts

08 Dec, 2022

From A to Z, here is everything you need to know about stainless steel carriage bolts, their uses, types and more.

What is a carriage bolt?

Carriage bolt is a type of fastener. It helps in connecting, joining and keeping wooden objects intact. It is available in different materials but the most trusted carriage bolts are made of stainless steel.

A carriage bolt has a mushroom head like a dome, it is threaded along the shank. The tip of a carriage bolt is either sharp or flat, depending on its type.

A carriage screw is secured by a bolt from the other end. A bolt is a square-necked steel object that grips the carriage to keep it intact.

Carriage bolt screws are also known as plow and coach bolts.


In the 1800s this fastener was used in securing the wheels of a carriage and that’s how it derived its name ‘Carriage Bolt’

What are commonly used carriage bolts?

There are different types of stainless steel carriage bolts available in the market. The physical properties and applications vary from one another.

Mainly there are 4 types of carriage bolts available, they are-

1) Round Head – Ribbed Neck

Commonly known as coach bolts, round head and ribbed neck bolts are made of low carbon steel. Due to this property, a coach bolt is used in securing soft and ductile metals, plastic & wood.

2) Round head – short neck

As the name suggests they have a round head and short neck. They have unified threading along the shaft. They are excellent for the application on steel sheets because of their short neck feature. Due to the short neck a strong obstruction os formed between the layers.

These bolts are made of low to medium carbon steel.

3) Flat head – square neck

These are used mainly for the garage & automobile industry because of their flat head. The flat head design provides a low profile in comparison to a round head bolt when drilled in front or on the top.

This makes it a popular choice for car door fittings.

4) Fin neck

They have a rounded head but their shaft has a flat bearing. They are made of low carbon steel and popularly used for thin plywood applications as the flat shaft doesn’t damage the delicate objects.

How to choose the right carriage bolt?

When it comes to picking the right carriage bolt, there are two main aspects to be taken into account, one is longevity and other is quality of the carriage bolt.

For uncompromised quality and longevity, one should go for a stainless carriage bolt. Because steel is a material that is strong, scratch resistant and corrosion resistant.

If you want an alternative for stainless screws, one can go for hot dipped galvanized steel; it is proven to be good for exterior applications.

However if the structure is going to be in touch with water, it is best to use a stainless carriage bolt.

Uses of Carriage Bolts

The application of carriage bolt is easy and effective. This is the reason for the popularity of carriage bolts across multiple industries.

A carriage bolt is ideally used for fastening wood or metal substances. It can fasten wood to wood, metal to metal and also wood to metal. Apart from it a stainless carriage bolt can also fasten two different kinds of metal components together.

Carriage bolts are used for building of water conservation machines , constructing railroads, manufacturing of farming and mining equipments.

Remember this while working with carriage bolts

– To fit in a carriage bolt, one must have a hammer, a drill, a drill bit , a nut and a washer.
– A carriage bolt isn’t hammered in, it is drilled in, so a pre- drilled hole is necessary before fitting the carriage bolt.
– It is necessary to use a washer before securing the bolt to avoid the damage on the substance.

Removing the carriage bolt is also a very easy process, it can be unfastened by twisting the nut and then hammering from the bottom, until the bolt comes out.

This was the A to Z everything you need to know about Carriage Bolts. If you still have more questions that you’d like to understand about carriage bolts, leave us a message below and we will answer that too.