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Internet # 100119368

Model # 21316

Store SKU # 161144

#8 1 in. External Hex Flange Hex-Head Self-Drilling Screws (170-Pack)

$15.55
  • Teks Hex head screw for metal to metal fastening
  • Teks Self Tapping Self Drilling Metal to Metal Fastener
  • For use in HVAC, duct work, steel stud framing metal fastening
  • View More Details

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Product Details

About This Product

Teks #8 x 1 in. Zinc-Plated Steel Hex-Head Self-Tapping Drill-Point Screws (170-Pack) are ideal for attaching HVAC, electrical, metal framing, and general metal-to-metal applications for secure fastening and strong holding power. Teks screws provide secure metal-to-metal fastening and strong holding power without the need to pre-drill. Screws tap their own threads. Engineered drill point and flute allow for efficient material removal

Highlights

  • Teks Metal Fastening screws provide secure metal to metal fastening without the need to pre-drill and reduces cam-outs for high performance drive surfaces and recess
  • Precise point designed to drill, tap and fasten all in 1 motion
  • High performance drive surfaces reduce cam-outs to penetrate surface the first time for easy installation
  • Zinc plated finish protects the job's appearance
  • No slippage even with older sockets and worn bits
  • No pre-drilling is necessary
  • Highly versatile
  • Common project applications: roofing, HVAC, steel stud framing, gutters and register vents
  • Return Policy

Product Information

Internet # 100119368

Model # 21316

Store SKU # 161144

Additional Resources

Shop All Teks

Specifications

Dimensions

Screw Length

1 in

Size

#8

Details

Drive Style

Hex

Fastener Color

Silver

Fastener Material

Carbon Steel

Fastener Plating

Clear Zinc

Fastener Type

Self Drilling Sheet Metal Screws

Features

ACQ Rated

Head Style

Washer Head

Interior/Exterior

Interior

Measurement System

Inches

Package Quantity

170

Product Weight (lb.)

.005 lb

Returnable

90-Day

Thread Style

Coarse Thread

Warranty / Certifications

Manufacturer Warranty

This product is sold "as is" without any express or implied warranties. ITW Brands' sole liability, if any, shall be to replace this product or refund the purchase price.

Questions & Answers

Are these two 5’s?
ByJul 16, 2026
1 Answer | 
Answer This Question

Hi there - thank you for contacting us. To better assist you and understand your question please feel free to call us at (800)222-6990 or email us at teks@itwbrands.com, if you have any questions.

By|Jul 23, 2026


    NSF approved?
    ByJul 8, 2026
    1 Answer | 
    Answer This Question

    HI there - thank you for contacting us. To further assist you and understand your question. please feel free to call us at (800)222-6990 or email us at teks@itwbrands.com, if you have any questions.

    By|Jul 23, 2026


      Would these work on wood
      ByJul 2, 2026
      1 Answer | 
      Answer This Question

      Hi there, thank you for contacting us. No, these metal-to-metal self-drilling Tek screws will not work well for fastening into solid wood. Please feel free to call us at (800)222-6990 or email us at teks@itwbrands.com, if you have any questions.

      By|Jul 9, 2026


        What’s the max thick steel this can go into
        ByFeb 9, 2026
        1 Answer | 
        Answer This Question

        Hi there - thank you for contacting us. #14 x 1-1/2 in. external hex washer head self-drilling screws are designed to drill into steel between 20 and 12 gauge. The product packaging and Home Depot online photos list the ranges. Please feel free to call us at (800)222-6990 or email us at teks@itwbrands.com, if you have any questions.

        By|Feb 10, 2026


          How much weight can it hold
          ByJan 26, 2026
          1 Answer | 
          Answer This Question

          Hi there - Thank you for your interest in Teks fasteners. Unfortunately, we do not have technical data available for our Teks products line at this time. We are working to develop technical data sheets and hope to have that information available in the future. We apologize that we are unable to provide that information now. Please feel free to call us at (800)222-6990 or email us at teks@itwbrands.com, if you have any questions. Sincerely,

          By|Jan 26, 2026


            Do they come with a bit
            ByJan 3, 2026
            1 Answer | 
            Answer This Question

            Thank you for reaching out to us. These self-drilling screws do not include a drive bit. A standard 3/8" socket head would be required for installation.

            By|Jan 7, 2026


              Can u use this for exterior?
              ByNov 18, 2024
              1 Answer | 
              Answer This Question

              Thank you for reaching out to us, Julio. These metal to metal fasteners do have a corrosion resistant zinc coating but the screw is designed for interior applications such as ductwork and steel frame connections. It is not rated for exterior use. Hope this helps.

              By|Nov 18, 2024


                Will this enable me to attach a solar panel to a steel or iron post?
                ByOct 4, 2024
                1 Answer | 
                Answer This Question

                Hi there, thank you for your interest in our metal-to-metal screws. We need a few more details about your specific application as we want to ensure we are providing the best recommendation. Can you please reach our to our experts either by call or email? Please feel free to call us at (800)222-6990 or email us at teks@itwbrands.com. There we will gather the necessary specs to recommend the product you will need.

                By|Oct 7, 2024


                  Viewing 1-8 of 85

                  Customer Reviews

                  4.6 out of 5

                  • 4.6 out of 2,437 reviews
                  • 86% recommend this product
                  Filter by:
                  Showing 1-10 of 2,437 reviews
                  This customer chose to rate the product and not provide text.
                  by
                  • Verified Purchase
                  Disappointed
                  20 % of the screws dulled or snapped off before making it through 2mm carport steel.
                  by
                  Response from ITW BrandsJun 11, 2026
                  Hi there, thank you for your interest in our wood-to-metal screws. We need a few more details about your specific application as we want to ensure we are providing the best recommendation. Can you please reach our to our experts either by call or email? Please feel free to call us at (800)222-6990 or email us at teks@itwbrands.com. There we will gather the necessary specs to recommend the product you will need.
                    I purchased a metal awning to go over my bedroom window on a metal building to keep the snow from piling up on it. After assebling it I realized the screws were not the appropriate ones to use on a metal installation. I received these screw within a couple days. They are exactly what I needed. I'm antisipating a snow free window this winter!
                    by
                    Response from ITW BrandsJun 11, 2026
                    Hi there - thank you for sharing your positive experience with our Teks Screws. We work hard to make sure our products are well designed.
                    This customer chose to rate the product and not provide text.
                    by
                    As a contractor with nearly nine years of experience, I use metal screws for my projects—such as sliding gates.
                    by
                    • Verified Purchase
                    Your great you even delivered it for free!
                    by
                    • Verified Purchase
                    Weak. Broke.
                    The first two screws I used broke. My drill ripped the heads off and they got stuck in the metal. I then had to try to unscrew them out. Not sure how these have such a high rating when the metal is so weak. Idk. They sucked for me. Try another brand.
                    by
                      2 found this review helpful
                      Good metal to metal...
                      Good metal to metal
                      by
                      • Verified Purchase
                      These screws were perfect self-tapping for utility trailer to mount...
                      These screws were perfect self-tapping for utility trailer to mount e-track to ribs of trailer.
                      by
                      • Verified Purchase
                      My go-to screw for Screen Tight system.
                      I use these for securing Screen Tight system to metal or aluminum framing for porches. These are the best for outstanding security and just perfect when screwing into metal. I do Not pre-drill my holes9. When securing two pieces of metal together I pre-drill. Best product and had only 1 screw failed to drill of a box of 300.
                      by
                      • Verified Purchase
                      • Recommended
                      Showing 1-10 of 2,437 reviews

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                      Product Snapshot

                      Ideal for metal-to-metal fastening without pre-drilling, ensuring secure hold and easy installation.
                      Ideal for HVAC and electrical projects, these zinc-plated steel screws offer durability and secure fastening with a Phillips drive.
                      Ideal for metal-to-metal fastening without pre-drilling, ensuring strong holding power and easy installation.
                      Ideal for metal-to-metal fastening without pre-drilling, ensuring secure hold and easy installation.

                      Screw Size

                      #8 x 1 in.
                      #8 x 3/4 in.
                      #10 x 3/4 in.
                      #14 x 1 in.

                      Drilling Capacity

                      Material

                      Carbon Steel
                      Zinc plated Carbon Steel
                      Carbon Steel
                      Carbon Steel

                      Corrosion Resistance

                      Coating

                      Zinc plated
                      Zinc
                      Zinc
                      Zinc plated