WELCOME TO OUR Types of Screw: Where to use different screws PROJECT
This project is presented by thesitebox.com
Summary: Information on the different types of screws available and where to use them.
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Different types of screw do many different types of job and as with everything else in the Construction Industry and DIY world, the job is much much easier with the right tools, equipment and products. Take a look at our table and click on the type of screw you need to go through and buy them from thesitebox.com. Screwdrivers are below. Screw sizes vary and generally the larger the number the bigger the screw. For example a number 6 screw is much smaller than a number 12 screw. There are many types of fixing for all types of material and circumstances so make sure you get the right one to make the job easy. It is usually much easier to insert screws when you have drilled a pilot hole. This prevents the screw from binding. See how to drill the correct size pilot holes by clicking on the links. Countersinking the screws also makes for a much neater job.
As well as every type of screw thesitebox.com can provide you with all of the other fixings and tools you may need for your project. You can buy safely and get free 
delivery.
Substrate/Finish |
Type of screw |
Reason |
Internal |
External |
Hardwood |
Twin thread. |
Ease of start up and driving. |
||
Soft Wood |
Single thread. |
Strength in position |
See above |
|
Chipboard |
Single thread. |
High pull-out retention. |
Do not use chipboard outside.unless covered |
|
MDF |
Single thread with twin thread start. |
Twin thread allows ease of start up and single thread provides high pull-out retention. |
Do not use MDF outside unless covered. |
|
Wood – Traditional Finish |
Single thread |
Traditional finish required to product. |
||
Masonry |
Single thread. Case hardened with groove in thread to allow dust to escape. |
Single thread for hold and drive to grind into masonry. |
||
Metal |
Self tapper |
Cut their own thread into metal. |
||
Plasterboard |
Drywall screws. |
Sharp piercing point with twin thread and bugle head for flush finish. Can be collated for speed of insertion. |
|
N/A |
Floorboards |
Twin thread for fast start, single thread for hold, countersunk head. |
Ease of start up. High pull-out retention. Minimal splitting Flush finish. |
N/A |
|
Decking |
Sharp point, single thread with shank and countersunk head. |
Pierce surface, strength in position. Minimise jacking up and splitting. Flush finish. |
||
Roofing Sheet |
Roofing screws. |
Self-drilling and self-tapping with rubber bonded washer for weather proofing. |
||
Fencing and Garden Furniture Marine |
Rust resistant |
Resistant to corrosion. Speedy insertion. |
Never try to use the wrong screw. Not only will it be hard to put in but it may not hold for the job you want to do. For fixing methods to various surfaces, go back to the projects section. Fixing to masonry is a popular task as is fixing to plasterboard.
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