Self drilling screws are designed to drill, tap, and fasten in one operation, making them the preferred choice for fastening steel, sheet metal, aluminum, and wood to steel. Commonly referred to as self tapping screws or TEK® screws, these fasteners eliminate the need for a separate pilot hole in many applications, helping contractors and DIY builders save time while creating strong, reliable connections.
Construction Fastening Systems stocks a complete selection of contractor-grade self drilling screws in a wide variety of diameters, lengths, head styles, finishes, and drill point capacities. Whether you're fastening light gauge steel studs, structural steel up to 1/2" thick, HVAC ductwork, roofing panels, electrical supports, or wood to steel framing, you'll find the right self drilling screw for your application.
Throughout the construction industry, self drilling screws are often referred to as self tapping screws or TEK® screws. While these terms are frequently used interchangeably, there are important technical differences.
A self drilling screw features a drill-bit-style point that drills its own hole before cutting threads into the base material. A traditional self tapping screw forms threads but generally requires a pre-drilled pilot hole. Since self drilling screws also tap threads as they are installed, many contractors simply refer to them as self tapping screws.
TEK® is a registered trademark of ITW Buildex for its line of self drilling screws. Because of the brand's popularity, many professionals use the term "TEK screw" generically when referring to self drilling screws regardless of manufacturer.
Choosing the Right Self Drilling Screw
Selecting the proper self drilling screw starts with understanding the material you're fastening and the thickness of the steel being drilled. Choosing the correct drill point ensures faster installation, longer tool life, and a secure connection.
Match the drill point to the thickness of the steel.
Select the proper diameter for the required holding strength.
Choose a head style that fits your application.
Select zinc-plated or 410 stainless steel depending on the environment.
Choose the proper screw length to achieve full thread engagement.
Whether you're fastening light gauge steel framing, structural steel, sheet metal, or wood to steel, selecting the proper self drilling screw improves installation speed and long-term performance.
Common Applications
Self drilling screws are trusted by contractors across virtually every construction trade because they eliminate separate drilling in many applications while providing strong, dependable fastening performance.
Steel stud framing
Structural steel fabrication
HVAC duct installation
Electrical and conduit supports
Cable tray systems
Roofing and siding
Wood to steel framing
Metal buildings
Industrial fabrication
General sheet metal fastening
Why Buy from Construction Fastening Systems?
Construction Fastening Systems has supplied professional contractors with high-quality fastening products for more than 40 years. We stock contractor-grade self drilling screws in numerous diameters, lengths, head styles, finishes, and drill point capacities for commercial, industrial, and residential construction.
Whether you need standard point self drilling screws, heavy-duty screws for structural steel, stainless steel self drillers, or specialty fastening solutions, our knowledgeable team is committed to helping you find the right fastener for the job.
Frequently Asked Questions
What is the difference between a self drilling screw and a self tapping screw?
Self drilling screws feature a drill point that drills and taps in one operation. Self tapping screws generally require a pre-drilled hole before installation. Although many contractors use the terms interchangeably, they are technically different fasteners.
Do self drilling screws require a pilot hole?
No. In most applications, self drilling screws drill their own hole and cut threads as they are installed. Always choose the proper drill point for the thickness of the steel.
What materials can self drilling screws fasten?
They are commonly used for sheet metal, steel studs, structural steel, aluminum, HVAC ductwork, roofing panels, and wood-to-steel applications.
What drill point should I choose?
Standard drill points work well for light gauge steel, while heavy-duty drill points are designed for thicker structural steel. Choosing the correct drill point improves drilling speed and screw life.
What finish should I use?
Zinc plated screws are intended primarily for indoor applications. 410 stainless steel self drilling screws provide improved corrosion resistance and are commonly used in outdoor or damp environments. An exterior finish is a good choice for outdoor use as well as when installing treated lumber.
What screw diameter should I use?
#8 screws are used for lighter-duty applications, #10 screws are the most common general-purpose size, while #12 and #14 screws provide increased holding power for heavier-duty fastening.
Can self drilling screws be removed and reused?
They can usually be removed, but reusing them is generally not recommended because the drill point and threads may be worn after installation.
How do I choose the right self drilling screw?
Select your screw based on the material being fastened, steel thickness, screw diameter, length, head style, finish, and drill point capacity.
