Types of Self-Drilling Tek Screws

tek screws

INDENTED HEX WASHER HEAD UNSLOTTED

  • #3 or #4 SELF-DRILLING POINT
  • ZINC PLATED STEEL
  • Also available with PAINTED HEADS
phillips modified truss wafer head tek screw

PHILLIPS MODIFIED TRUSS / WAFER HEAD

  • #2 PHILLIPS / #3 TEK® POINT ​
  • ZINC PLATED STEEL
phillips flat reamer wings tek screw

REAMER TEK® SCREWS

  • #2 PHILLIPS / #2 AND #3 SELF-DRILLING POINT ​
  • ZINC PLATED STEEL
oval phillips self drilling silver tek screw

PHILLIPS OVAL HEAD

  • #2 PHILLIPS / #2 AND #3 SELF-DRILLING POINT
  • ZINC PLATED STEEL
phillips pan head tek screw

PHILLIPS PAN HEAD

  • #2 PHILLIPS / #2 AND #3 SELF-DRILLING POINT
  • ZINC PLATED STEEL
drywall tek screw

DRYWALL TEK® SCREWS

  • #2 PHILLIPS / #2 SELF-DRILLING POINT ​
  • BLACK OXIDE
phillips wafer head tek screw

WAFER HEAD PHILLIPS

  • #2 PHILLIPS DRIVE THREAD
  • FULLY THREADED POINT
  • SELF DRILLING POINT
  • ZINC PLATED CARBON STEEL
  • DESIGNED FOR PLYWOOD TO LIGHT-GAUGE METAL FASTENING
square drive trim head tek screw

TRIM HEAD

  • #1 AND #2 PHILLIPS / #2 SELF-DRILLING POINT
  • ZINC PLATED STEEL
phillips bugle head tek screw

PHILLIPS BUGLE

  • #2 PHILLIPS / #2 SELF-DRILLING POINT
  • ZINC PLATED STEEL

TEK Screw Buying Guide

Tek screws have changed the standards for the value of screws. They look so ordinary, yet they are so handy to have on the job site. All Points Fasteners has a variety of Tek screws on hand for you to get for your next job.

About Tek Screws

Tek screws — also called self-tapping fasteners or self-drilling screws — are screws that have a very small carving at the end of their tip, called a drill bit. The drill bit tip creates a small hole by tapping before driving it in. These screws are very popular since they offer so many benefits, such as:

  • Time-saving: Tek self-tapping screws cut back on the number of steps necessary to complete projects.
  • No pilot hole drilling: The drill bit provides a starting point for the screw to drill into, eliminating the need to pre-drill or wait for the thread to catch.
  • No corrosion: Tek screws are made from stainless steel and other materials that won’t corrode.
  • Durability: You can count on your Tek screws having a long life span, whether you use them in multiple projects or they’re left in extreme conditions.
  • Consistent performance: You can expect the same high performance every time.
  • Easy clean up: Since you don’t need to pre-drill, there won’t be any shavings for you to clean up.

Tek screws are meant for metal-to-metal applications only, except for the ReamerTek screw, which is designed exclusively for applications that are wood to metal.

How Strong Are Tek Screws?

Many contractors depend on Tek screws’ strength for reliable connections. Because Tek screws drill their own hole, they produce the ideal hole size. This single operation fastening results in better thread engagement, better alignment and a tighter fit.

Tek screws are also made from high-quality, specially treated steel, and they are cold-forged to ensure uniformity of the screw dimensions and drill point contours. With their durable construction, you can rest assured that Tek screws will provide the strength you need for your application.

Many of the Tek screws we carry are also zinc-plated. This type of finish provides exceptional corrosion resistance as well as increased strength to withstand the most challenging fastening demands and environments.

What Is a Self-Drilling Screw Used For?

Self-drilling Tek screws can be used for any job that would benefit from the screw’s many capabilities. Contractors use Tek screws for screwing metal to metal and sometimes wood to metal. They are common in the electrical industry, and they can be used for work with steel studs and other thin metal applications.

Depending on the thickness of the material you are drilling into, you have several drill points available. They range from 1 to 5, the shortest being a Tek 1 and the longest being a Tek 5, sometimes referred to as a “beam buster.” The longer the screw, the thicker the material that the screw can pierce.

Tek 2 through Tek 5 are used for metal to metal applications, so you can easily use Tek screws for steel, aluminum, copper and more. Sheet metal Tek screws are also ideal for fastening sheet metal without the need to pre-drill.

Tek screws allow the user to fasten two pieces of material together without pre-drilling. Their self-drilling nature allows work to be completed faster, which makes them well-suited for jobs that require a high volume of fastening tasks.

Are Self-Drilling Screws Good for Wood?

Standard self-drilling screws were never designed to go from metal to wood. The diameter of the hole that the drill bit creates is nearly the same diameter as the outside threads of the threaded portion of the fastener. If that’s the case, this will not allow the threads to tap into the wood and be secure. Tek screws are also ineffective for wood to wood applications.

The exception to this is some self-drilling screws that are manufactured for roofing applications. The drill bit on those screws is very tiny — a #1 drill bit — and the diameter of the hole that the drill bit makes is substantially smaller than the diameter of the outside threads of the rest of the screw. This allows the threads to bite into the material and the screws to self-tap into the metal or wood for a secure hold.

What Are the Tek Screw Sizes?

Tek self-tapping screws come in varying sizes. Self-drilling screws are available in a variety of shank diameters and lengths, as well as head styles. The type of work you are using them for will dictate which type you need to complete your project.

The diameter of a Tek screw is indicated as a numeric size with a range that runs from #0 to #15. The higher the number, the larger the diameter.  The most commonly used diameters are #8 Tek screws and #10 Tek screws.

Two of the most common types of head styles on Tek screws that you will find on the market are:

  • Hex washer head: They have a built-in washer at the head to distribute the load and weight over a wide area. The hex drive is the preferred drive of most contractors doing roofing projects or other kinds of heavy-duty metal installations.
  • Modified truss: These screws have an oversized domed head with a flange, like an integral washer. This creates a larger area under the screw head for a greater bearing surface.

Other than that, all other styles of heads on self-drilling screws generally have a Phillips drive, which helps in driving the screw in straight. The square drive is becoming more and more desired, as the bit is less likely to slip while driving. Phillips pan-head Tek screws are ideal for light-duty applications.

Another common type of screw is the flathead screw, which is used when you need a flush surface. Reamer Tek screws — self-drilling screws with wings — are the ultimate wood to metal screws.

We are often asked for stainless steel self-drilling screws. They are available, but the tips are not the best for drilling into stainless steel. For stainless steel applications, we suggest bi-metal Tek screws, where the body of the screw is stainless steel, and the tip is made of carbon steel, which allows the screw to drill into the stainless steel with ease.

In the case of hex head Tek screws, check out our video to help you understand how to determine the size of screws based on the size of the hex head, plus other additional information.

How Do You Use Tek Screws?

You can use a drill or an electric screwdriver to driver Tek screws. For extra assurance that the screw will go in straight, you can create a pilot hole. When you create a pilot hole, make sure that the hole is a little smaller than the Tek screw. If the hole is the same size or larger, the screw’s grooves will not catch and provide secure fastening.

One of the benefits of self-drilling Tek screws is that you do not need to drill a pilot hole to use them, so many people choose not to. If you do not use a pilot hole, drive the Tek screw in slowly to ensure it goes in straight. Once it is in, tighten it firmly but without using excess force. Overtightening can cause head stripping, which makes it difficult to remove the Tek screw in the future.

Regardless of whether you use a pilot hole, you want to make sure that the metal thickness of the piece you are drilling into is thinner than the length of the drill point on your Tek screw. The screw will snap if its threads make contact with the metal’s surface before the tip has bored through, as this will result in the tip and the head of the screw moving at different speeds and generate stress in the middle.

Get All the Fasteners You Need at All Points Fasteners

At All Points Fasteners, we offer quality fasteners and parts for roofing, HVAC and other industries that need screws they can rely on at the job. We have a large selection of Tek screws available in many head types, lengths and more. With our variety, you are sure to find what you need. If we don’t have what you are looking for, we will find it for you and get it to you quickly.

On top of our quality fasteners, All Points Fasteners has outstanding customer service. Our team will help you find the right part, so you can trust that what you get will work how you want in your application. We’ll do all that we can to make sure that you are confident in your purchase.

All Points Fasteners has the Tek screws and other fasteners you need for your next project. We provide free quotes as well as free samples before you buy so that there are no surprises when your order arrives. If you don’t see the screw that you are looking for, we will find it for you. Fill out the contact form on our website or call us at 800-483-6354.

tek screw specs

TEK Screw Informational Video

 




Self Drilling TEK Screw Specs

 

The values listed above are averages achieved under laboratory conditions and imply no warranty. Appropriate safety factors should be applied to these values for design purposes.

A minimum of 3 factors of safety should be used. Allow at least three full threads to extend beyond material.

The distance from the center of a screw to the end or edge of a metal member shall not be less than three times the screw diameter.

Steel members shall conform to section 2230, A3 of the code. 25ga, 20ga, 18ga-Astm A 653 Grade 33 S.Q. with a minimum of 33,000 psi yield strength. 16ga, 14ga, 12ga-Astm A 653 Grade 50 S.Q. with a minimum of 50,000 psi yield strength.

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