Types of Nuts and When to Use Them

Posted by bolt_admin


Posted on November 15, 2017



Almost always used in conjunction with a bolt in order to fasten materials together, a nut is a type of fastener that has a threaded hole. Here is a breakdown of the most common types of nuts and when to use them.

1. Hex

This is a hexagonal shaped nut. It is one of the most common nut types as its shape gives good angles for a tool to approach and tighten. They are some heavier set hex nuts available that provide a more durable grip for bigger load bearing tasks.

2. Wing

A wing nut is the perfect choice for those without tools, as their shape means they are easily tightened by hand. A big consideration for wing nuts is that they stick out of the fastened material and so, are probably not the most appropriate option for heavy foot traffic areas.

3. Cap

As its name suggest, this is a nut with a domed top over the end. They are also called crown hex nuts, and are available with a slightly larger dome in what’s called an Acorn Nut. Its purpose is to prevent contact with the external thread in order to protect the thread from contact and friction. It also has the added benefit of providing a great looking finish.

4. Flange

This nut has a build in washer referred to as a flange. The flange acts as an integrated, non-spinning washer. It is useful in distributing the pressure and reducing the damage to that part of the nut making it less likely to loosen over time.

5. Square

As you may have guessed, this is a four-sided nut. Their large surface area makes them ideal in resistance to tightening and loosening. Therefore, they are commonly used in the construction of furniture and metal fastening applications.

6. Coupling

These are long nuts that are used to connect pieces of threaded rod or other male fasteners. They are also commonly called extension nuts, and are shaped like the hex nut so that a wrench can easily hold it.

7. Slotted

These nuts are used in combination with a cotter pin or drilled shank fastener in order to prevent loosening. They are also called castle nuts, as they have grooved heads that will align with the mating bolt in order to lock into place.

For all of your fastener requirements for home hardware, industrial, marine and engineering purposes, visit Bolt In. We stock and supply a vast range and variety of fasteners and tools to suit any job. Speak with our expert team or visit us at our Gold Coast shop for all of your hardware supply needs.

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