As every builder knows, your choice in screw can make a big difference in the success of your project. The self-tapping screws provide the benefit of precisely fitted threads, but that doesn’t mean that they’re necessarily well-suited for every construction need. Below are answers to common questions about self-tapping screws so you can identify which particular type to buy.
Self-tapping screws are used for attaching metal to either metal or wood.
Self-tapping screws create their own threads in the substrate unlike machine screws that require the substrate to be tapped with threads prior to installation.
Self-tapping screws should not be used if there is not a pre-drilled hole in both the panel and the substrate. The exception to this rule is if you attach steel panels (no thicker than 22ga) to a wood substrate while using a #14 Type A Milled Point screw.
Thread-forming screw create their threads by moving the the substrate material around the threads. Alternatively, thread-cutting screws actually remove the substrate material around the threads.
Self-tapping screws have different strength characteristics, depending on diameter and the thread profiles. Strength information for each product can be found on data sheets.
In our Quality and Engineering departments, SFS uses both corded and cordless Dewalt drills. However, any power drill capable of holding a drill bit can be used.
The hole size for self-tapping screws depends on the thickness of the materials being fastened. Hole size for each product and different material thickness can be found on product data sheets.
Yes, self-tapping screws can be removed. Please consult with SFS for recommendations on suitable replacement fasteners.
Yes, self-tapping screws can be used with steel without hesitation. However, we advise consulting with the experts at SFS before using it with aluminum and other metals.
Yes, our #14 Type A Milled Point screw can be used in wood substrates.
No, only screws that are specifically designed for concrete can be used with concrete.
No, self-tapping screws cannot be reused.