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Internet # 202349092

Model # 16083

Store SKU # 740695

#8 x 3-1/8 in. Star Drive Trim-Head RT Composite Exterior Trim Screw (514-Pack)

Contains 4.77 pounds
$67.97
($14.25 /pound)
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  • GRK composite RT decking screws for composite and PVC decking
  • GRK composite RT screws for exterior composite window trim
  • GRK composite RT screws for composite and vinyl fencing
  • View More Details

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Return this item within 90 days of purchase.

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Product Details

About This Product

GRK Fasteners #8 x 2 in. RT Trim Screws (100 per Pack) are Climatek coated for corrosion resistance and suitable for composite decking applications. Small heads, a W-cut thread design and Zip-Tip, preventing material from splitting. No pre-drilling is required. The small diameter head allows for a clean finish.

Highlights

  • Use for composite decks and trim applications
  • Climatek indoor/outdoor coating provides corrosion resistance (ICC-ES AC257 code approved for use in treated lumber)
  • Small screw head with code approval for structural performance
  • Zip-Tip provides a fast bite, eliminating pre-drilling for single step installation
  • W-Cut threads allow for low torque and fast drive
  • Trim head allows for a clean look
  • Precision fit recessed star drive creates zero stripping with 6-points of contact
  • Click here to see the Full Line of GRK Fasteners
  • Return Policy

Product Information

Internet # 202349092

Model # 16083

Store SKU # 740695

Specifications

Dimensions

Screw Length

3-1/8 in

Size

#8

Details

Drive Style

Torx

Fastener Color

Brass

Fastener Material

Carbon Steel

Fastener Plating

Polymeric Zinc

Fastener Type

Wood Screw

Features

ACQ Rated, Self Tapping

Head Style

Trim Head

Interior/Exterior

Exterior, Interior

Measurement System

Inches

Package Quantity

514

Product Weight (lb.)

4.77 lb

Returnable

90-Day

Thread Style

W-Cut Thread

Warranty / Certifications

Manufacturer Warranty

Visit our website at grkfasteners.com and type in warranty in the search box for detailed warranty information

Questions & Answers

Is the star bit included?
ByJul 31, 2026
1 Answer | 
Answer This Question

Hello, thank you for reaching out. Yes, a 2" bit is included with the purchase of the screws. If you have any other questions, feel free to call our hotline. The number 800-222-6990. Have a great day!

By|Aug 4, 2026


    can it be used to screw into metal studs
    ByJun 2, 2026
    1 Answer | 
    Answer This Question

    HI there - thank you for contacting us. GRK screws have specially designed features for wood-to-wood attachments with no pre-drilling. Applications using other materials are outside of the intended use of this product. For questions regarding fastening in your application, we recommend contacting a licensed professional engineer to evaluate. Please feel free to call us at (800)222-6990 or email us at grk@itwbrands.com, if you have any questions.

    By|Jun 2, 2026


      Can these be countersinked?
      BySep 25, 2025
      1 Answer | 
      Answer This Question

      Thank you for contacting us. The small head diameter of the standard Fin/ Trim will bury into wood cleanly. The reverse thread or RT version bores a slightly larger hole to prevent mushrooming with composite materials.

      By|Sep 30, 2025


        Will these screws cut into metal studs?
        BySep 16, 2025
        1 Answer | 
        Answer This Question

        Hi there - thank you for contacting GRK Fasteners. GRK screws have specially designed features for wood-to-wood attachments with no pre-drilling. Applications using other materials are outside of the intended use of this product. For questions regarding fastening in your application, we recommend contacting a licensed professional engineer to evaluate. Thank you.

        By|Sep 16, 2025


          What size torque bit is required
          ByJun 9, 2025
          1 Answer | 
          Answer This Question

          Thank you for contacting us. The #8 trim screws require a T-10 Torx bit to install. There is one 1" bit included in each carton. Hope this helps.

          By|May 2, 2026

            (1)

            How are you supposed to remove these if a board needs to be replaced? Trying to unscrew them just makes them dig deeper!
            ByJun 21, 2024
            1 Answer | 
            Answer This Question

            Hi, Isaac. Since it’s an RT screw with the reverse thread under the head, you should be able to get the screw to start backing out if you slowly try to start the screw clockwise (install direction) while putting some weight on the board near the screw. Please feel free to call us at (800) 222-6990 or email us at grk@itwbrands.com for more assistance.

            By|Jun 28, 2024


              Can these be used for sheet siding?
              ByDec 28, 2023
              1 Answer | 
              Answer This Question

              Hi there, thank you for your interest in our RT Composite 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 (877) 489-2726 or email us at CS@itwbrands.com. There we will gather the necessary specs to recommend the product you will need.

              By|May 31, 2024


                how does climatek coating compare with grip rite primeguard plus composite deck screws?
                ByDec 2, 2023
                1 Answer | 
                Answer This Question

                Hi there, our Climatek coating is AC257 code approved for use in treated lumber, and provides corrosion resistance. For more information on which product may be best for your application please feel free to call us at (877) 489-2726 or email us at CS@itwbrands.com.

                By|Feb 2, 2024


                  Viewing 1-8 of 30

                  Customer Reviews

                  4.7 out of 5

                  • 4.7 out of 869 reviews
                  • 90% recommend this product
                  Filter by:
                  Showing 1-10 of 869 reviews
                  Do not use these.
                  Garbage product. The hears strip very easily and you ABSOLUTELY need to pre-drill. These screws resulted in damage to multiple, very expensive, composite boards.
                  by
                  Response from ITW BrandsJun 17, 2025
                  Hi there, thank you for sharing your feedback. We are sorry to hear that your experience with our cabinet screws did not match your expectations this time. Please feel free to call us at (800)222-6990 or email us at grk@itwbrands.com. We’d like to learn more about your experience and make things right.
                    1 found this review helpful
                    Great Product
                    I used these to screw all the faces of the cabinets together for extra strength and support.
                    by
                      • Recommended
                      These things are so good they can screw a raindrop down
                      by
                      • Verified Purchase
                      Worked pretty good! I didn’t even know they existed until I saw them on your site
                      by
                      • Verified Purchase
                      nice quality
                      We used these to connect cabinets at the face. They worked out great and hold good. pre-drill hardwood with a 1/8" drill bit and they were nice and tight with no chance of splitting. After using hundreds, the start heads are perfect, no stripping. The heads are nice and small to hide, can barely be seen.
                      by
                        • Recommended
                        1 found this review helpful
                        This product works wander full love it, It makes my days so much easier thank you guys great prod...
                        This product works wander full love it, It makes my days so much easier thank you guys great product.
                        by
                        • Verified Purchase
                        • Recommended
                        Easy to use on pvc boards. Wish they came in shorter lengths. These nails were a bit too long f...
                        Easy to use on pvc boards. Wish they came in shorter lengths. These nails were a bit too long for my project.
                        by
                        • Verified Purchase
                        • Recommended
                        These screws are excellent for decking and trim and cabinetry work. LOVE them!
                        These screws are excellent for decking and trim and cabinetry work. LOVE them!
                        by
                        • Verified Purchase
                        • Recommended
                        These fasteners were exactly what I needed to secure 2x6 boards with toenailed screws and not lea...
                        These fasteners were exactly what I needed to secure 2x6 boards with toenailed screws and not leave a head showing, since I could countersink them all just a bit, and I will cover them with putty to keep the wood watersealed. They have great bite as they go in, and do a nice job of securing these boards. This is a redo of a screened porch before placing new SCREEN TIGHT system (also from HD) on the inside of the porch, and on the face of these boards and the existing trim. New boards are at the base, and I will be adding 2x4's with same screws to mid point. Old external wooden screens in the photo can be removed after I install the new system.
                        by
                        • DIY
                        • Verified Purchase
                        • Recommended
                        Bought these to re-attach Azek Decking that I had to pull up because of support board failure (af...
                        Bought these to re-attach Azek Decking that I had to pull up because of support board failure (after 10 years, wet (ish)) to replace the wood underneath. These have a self-drilling tip and screw down well. (You need to pay attention to NOT pull all the way through this material. (see pictures) These go in on a diagonal, through the side of the decking leaving only a small hole that is not very visible. These were just what I wanted for the job (very similar to what the contractor had used when the deck was built). I have used GRK fasteners for a number of projects and these "odd" configuration fasteners are much nicer than "normal" screws.
                        by
                        • DIY
                        • Verified Purchase
                        • Recommended
                        1 found this review helpful
                        Showing 1-10 of 869 reviews

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                        Product Snapshot

                        Ideal for composite decking, these screws are climate coated for corrosion resistance. The self-tapping design with W-cut threads prevents splitting, making installation easy.
                        Ideal for composite decking, these screws prevent splitting with a self-tapping design and resist corrosion. Built for long-lasting durability and high performance in exterior applications.
                        Ideal for composite decking, these self-tapping screws prevent splitting and corrosion. Built for exterior use with a trim head for a clean finish.
                        Great for homeowners looking for corrosion resistance, making carpentry projects easier.

                        Length

                        3-1/8 in
                        2-1/2 in
                        2 in.
                        1-1/2 in.

                        Diameter

                        #8
                        #8
                        #8
                        #8

                        Thread Type

                        W-Cut Thread
                        W-Cut Thread
                        W-Cut Thread
                        W-Cut Thread

                        Material

                        Carbon Steel
                        Carbon Steel
                        Carbon Steel
                        Carbon Steel

                        Head Type

                        Trim Head
                        Trim Head
                        Trim Head
                        Trim Head