5 Things to Know Before Buying Double Head Screw Nut
Screws Buying Guide | Types of Screw Explained - Toolstation
Whether you're a professional or a keen DIYer, chances are you'll need a selection of screws for that next big job. But with so many types of screw available, each one designed for a different material and surface, making the right choice for your project can be a nightmare!
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When you're considering which type of screw you need, there are a few main things to consider. Firstly, you need to choose the right type of screw. Choosing the wrong screw type for the job can damage your surfaces, your tools, and the screw itself.
Secondly, make sure to choose the right size screw. A screw that's too short won't hold the materials together, while a screw that's too long could go right the way through the material or damage wiring or pipework in walls or floors. Similarly, a thick screw may damage brittle surfaces, while a thin screw might not be strong enough for the job.
Finally, consider the screw features. This includes the drive type, the head type, the material, thread, and even the colour of the screw.
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A screw is made up of four parts. The tip is the part of the screw that penetrates the material when driven in ' and is either pointed or flat depending on the screw's primary use and whether there is a pre-drilled hole. Self-tapping screws have a split point that cuts into the surface like a drill bit.
The screw thread wraps around the shank. These parts of the screw drive into the material and secure it. There are different types of shanks and threads, including twinthread screws which have two threads running along the shank and can be driven and removed faster, and hold materials more securely.
The head of the screw differs across screws and determines the drive type, meaning the type of screwdriver you'll need to turn it. Each drive type has its own pros and cons, such as higher or lower torque ' also known as the force required to rotate the screw.
There are a wide range of screw types available, each one for a different purpose. Using the correct screw will mean the material is more secure and less likely to be damaged. You'll also find some screws are better suited for extreme conditions such as marine environments, which means they'll last far longer when exposed to the elements.
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