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Internet # 300657700

Model # 23401

Store SKU # 1002419400

#9 x 1-1/4 in. Serrated Flat Head Star Drive Cement Board Screws (185-Pack)

$11.98
  • Backer-on cement board screws are corrosion resistant
  • Use to install Hardibacker, backerboard and cement board
  • Ideal for use in showers, backsplashes, countertops and floors
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Return this item within 90 days of purchase. Read Return Policy
Product Details

About This Product

Backer-On 1-1/4 in. cement board screws (185 pack) are the premier fastening solutions for installing cement boards. The patented serrated head design countersinks for flush seating at any angle, providing a smooth surface for tile installation. The star drive recess combined with Stikfit bit supports easy one-handed installations and eliminates cam outs. The premium corrosion resistant finish prevents rust from bleeding into grout, making Backer-On screws the perfect choice for use in high moisture areas such as bathrooms and kitchens.

Highlights

  • Serrated head design for flush seating even at an angle
  • Star drive with T-25 bit provides StikfitTM for easy 1-handed installation and eliminates cam-outs
  • Serrated thread forms require less torque for faster installation
  • Patented sharp point offers immediate pick-up and eliminates the need to pre-drill
  • Patented design allows attaching close to edge on cement board, drastically reducing fractures or blow outs
  • Premium corrosion resistant finish
  • Use to attach cement board to wood or light gauge steel studs
  • Ideal for use in high moisture areas such as showers, backsplashes, countertops and floors
  • Return Policy

Product Information

Internet # 300657700

Model # 23401

Store SKU # 1002419400

Additional Resources

Shop All Backer-On
From the Manufacturer

Specifications

Dimensions

Screw Length1-1/4 inSize#9
Thread Pitch (mm)2.6 mmThreads Per Inch (TPI)9.8

Details

Drive StyleTorxFastener ColorGreen
Fastener MaterialCarbon SteelFastener PlatingZinc
Fastener TypeCement Board ScrewsFeaturesSelf Tapping
Head StyleFlat HeadIncludedDriver Bit
Interior/ExteriorInteriorMeasurement SystemInches
Package Quantity185Product Weight (lb.)1.16 lb
Returnable90-DayThread StyleHi-Lo Thread

Warranty / Certifications

Manufacturer WarrantyITW Brands warrants that this product is free from defects in material and workmanship. ITW Brands’ sole liability for any breach of this warranty shall be to replace this product or refund the purchase price.

Questions & Answers

36Questions
caret
Q:Can these be used like a tapcon if I pre drill? I want to install over painted concrete chimney block as a base for cultured stone to stick to, since the block is painted.
by|Jan 17, 2024
1 Answer
Answer This Question

A:  Hi there, we do not recommend using these screws in place of Tapcon concrete anchors. For this application we do recommend you use Tapcon anchors, they do come in blue and white if you need a better color match.

by|Jan 26, 2024
    caret
    Q:Can I use these for exterior plank siding application?
    by|Nov 2, 2023
    1 Answer
    Answer This Question

    A:  Hi Jason, thank you for your question. We do not recommend using these screws for this application. You may be able to use a GRK RT Composite screw but for the best recommendation please call us or email us at: (877) 489-2726 or email us at CS@itwbrands.com.

    by|Jan 26, 2024
      caret
      Q:What type of screws should be used when the hardboard is being attached to pressure treated wood?
      by|Oct 31, 2023
      1 Answer
      Answer This Question

      A:  Hi there, thank you for your question. We do need some more details to ensure these are the correct screws for your application (such as the thickness of the board and type of wood). Typically, our cement board screws can go through the cement boards into wood. Please feel free to call us at (877) 489-2726 or email us at CS@itwbrands.com.

      by|Feb 2, 2024
        caret
        Q:Do holes have to be pre-drilled to use these screws?
        by|Sep 12, 2023
        1 Answer
        Answer This Question

        A:  Hello - Thank you for your question. Backer-On screws can self-drill through cement board and do not require any pre-drilling.

        by|Sep 15, 2023
          Showing 1-4 of 36

          Customer Reviews

          4.7 out of 5

          • 4.7 out of 978 reviews
          • 91% recommend this product
          Filter by:
          Showing 1-10 of 978 reviews
          very solid
          Used these to hang 1/4” cement board overtop our drywall for an accent wall project. Drilled into the studs, they will not work if installed just into the drywall
          by
            • Recommended
            These are excellent screws for attaching backer board to either...
            These are excellent screws for attaching backer board to either wood or metal studs. They seat flush and hold securely. They come with T25 bits so no need to buy separately.
            by
            • Verified Purchase
            Excellent Screw for any backer board
            Every screw is perfect. Of course when I hit a nail head underneath then the screw cannot penetrate, but that was rare. This screw made the entire backer board project ALMOST fun! The tip easily penetrates, and the screw head has a digging action which makes the flush setting that-more-easier.
            by
              • Recommended
              1 found this review helpful
              These screws were easy to use and work well with the Hardibacker board. They drive down into the...
              These screws were easy to use and work well with the Hardibacker board. They drive down into the board well making it easy to level tile without a screw sticking up proud of the surface.
              by
              • Verified Purchase
              • Recommended
              1 found this review helpful
              These screws worked as expected. Most screw heads countersunk the first time. The screws that wer...
              These screws worked as expected. Most screw heads countersunk the first time. The screws that were still exposed above the surface were my fault for stop driving them short. When I found the exposed heads they went in deeper with a little more effort with the impact driver.
              by
              • Verified Purchase
              • Recommended
              1 found this review helpful
              Worked just like it was recommended on video about Hardie Cement Board
              Worked just like it was recommended on video about Hardie Cement Board
              by
              • Verified Purchase
              Forget it if you wanna put 1/2” hardie board
              Cheap and flimsy. It won’t go through and lots of energy to work with. Should have stick with GRKs. Wanted to try these but now I know what a junk they are.
              by
                5 found this review helpful
                Awesome screws for use with Hardy board. It cuts thru the board quick and doesn't split the mater...
                Awesome screws for use with Hardy board. It cuts thru the board quick and doesn't split the material.
                by
                • Verified Purchase
                • Recommended
                Excellent countersink desgin, Durable anti corosive finish, reliable star head drive tip included...
                Excellent countersink desgin, Durable anti corosive finish, reliable star head drive tip included. My application through Hardie Panel and existing 1/2" composite exterior resulted in a solid to stud finish.I give this is a professional product my highest rating.
                by
                • Verified Purchase
                • Recommended
                1 found this review helpful
                Excellent product. Very reliable. Years ahead of phillips head screws.
                Excellent product. Very reliable. Years ahead of phillips head screws.
                by
                • Pro
                • Verified Purchase
                • Recommended
                Showing 1-10 of 978 reviews

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