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Self Drilling Screws

TEK, ZIP and Oval Self-Drilling, Self-Tapping Screws

Self-drilling screws have become a go-to for many roofing, sheet metal, wood and other industrial uses because they enable you to drill without first making a pilot hole. While self-drilling screws are often used for joining sheet metal and other materials, they have a variety of other applications based on shape, size and material.

Steel is one of the most common materials for self-drilling screws for sheet metal because it offers significant strength. The downside to pure steel is it trades corrosion resistance to secure that additional strength.

Stainless steel is best used when you need corrosion resistance because it incorporates chromium and nickel alloys. Different gradings denote different alloy compositions, so be sure to match your job with the right grade.

Self-Drilling Versus Self-Tapping

The debate over self-drilling vs. self-tapping screws is common because the terminology can be a bit confusing. Avoid such issues with this quick guide that highlights the differences between self-drilling vs. self-tapping screws.


Many people often wonder what is a self-drilling screw? Self-drilling screws, which often feature the TEK and ZIP brand names, have drill-bit points that assist the drill in biting into metal and other materials so you don’t need any pre-drilled holes. They’re typically designed to work in soft steel and metals, and will feature a number of 1 through 5. The larger the number, the thicker the material it can go through before you need a pilot hole.

Self-tapping screws are threaded in a way that allows them to cut their own threads as the screw is driven down into the material. They will feature a sharp cutting edge that actively drills away the material. The interesting note is this is not really about the point at the end of the screw, but more about the design of its threads.

A self-tapping can have a sharp point or a drill bit point.

Self-Drilling Roofing Screws
All Points Fasteners stocks a variety of self-drilling screws for roofing. We’ll meet your size requirements for each job and can meet a variety of different requirements such as ASTM C954-93, ICBO-AC118 and AISI-CF 92-1.

Be sure to ask us about self-tapping roofing screws that are the perfect stainless steel option for almost any roofing job.

Self-Piercing Wood Screws
Are you interested in woodworking? You’ve come to the right place for self-tapping wood screws. Our stock can match specific needs such as working with particleboard and face framing. We carry a full line of wood working screws.

Not only do you get the strength you need, but All Points Fasteners provides multiple finishes to ensure your self-tapping self-piercing wood screws fit your project’s aesthetic requirements.

See all of our TEK, ZIP and oval self-drilling and self-tapping screws with our Screw Index. If you need help matching the right screw to your job, just contact us. If you are unsure about just the screw you need, ask us about FREE samples before you place any order.