Frequently Asked Questions : Self-Drill Fasteners

SFS Group USA Product Engineer Jimmy Cole Answers Common Questions About SFS' Self-Driller Family of Fasteners.

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.

What is a self tapping screw used for?

Self-tapping screws are used for attaching metal to either metal or wood.

What is the difference between self-tapping screws and "normal" screws?

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.

When should I not use self-tapping screws?

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.

What's the difference between between thread-forming and thread-cutting screws?

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.

How strong are self-tapping screws?

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.

What are the best drills for self-tapping screws?

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.

What is the recommended hole size for self-tapping screws

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.

Are self-tapping screws removable?

Yes, self-tapping screws can be removed. Please consult with SFS for recommendations on suitable replacement fasteners.

Can you use self-tapping screws for steel and other metals?

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.

Can self-tapping screws be used in wood?

Yes, our #14 Type A Milled Point screw can be used in wood substrates.

Can self-tapping screws be used in concrete?

No, only screws that are specifically designed for concrete can be used with concrete.

Can self-tapping screws be reused?

No, self-tapping screws cannot be reused.

Have More Questions? Contact the Team Today!

in the U.S.:
» 1-800-234-4533

in Canada:
» 1-866-847-5400