Category:Thread-forming screws
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Screws that form their own thread on being driven into a material.
There are two broad categories: woodscrews, for use in wood, that work by cutting a thread and also self-tapping screws that work by deforming a thread into ductile materials, such as metals and softer plastics.
Most of these screws are also self-drilling and can form their own hole. Most woodscrews can do this, many self-tapping screws require a small undersized pilot hole to start them. Some self-tappers have an inbuilt drill point, others (e.g. Taptite) require a carefully sized pilot hole and form the thread within this.
Subcategories
This category has the following 2 subcategories, out of 2 total.
S
- Self-tapping screws (24 F)
W
Media in category "Thread-forming screws"
The following 2 files are in this category, out of 2 total.
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Concrete screw.jpg 4,228 × 1,252; 3.2 MB
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Concrete Screw.png 1,277 × 276; 584 KB