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Model # 23411

Store SKU # 1002419401

#9 x 1-5/8 in. Serrated Flat Head Star Drive Cement Board Screws (140-Pack)

$1147
  • Seats flush even when driven at an angle
  • One handed installation (includes T-25 star drive bit)
  • Immediate pick-up into cement board
  • View More Details
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Return this item within 90 days of purchase. Read Return Policy
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Product Details

The Backer-On 1-5/8 in. Cement Board Screws are designed for attaching HardieBacker or equivalent fiber cement backerboard to wood or light gauge steel studs. Backer-On's patented serrated head design countersinks for flush seating at any angle, providing a smooth surface for tile. The Star drive recess with T-25 bit provides StikfitTM for 1-handed installation. Backer-On screws feature a Climacoat corrosion resistant finish that prevents rust from bleeding into grout and are perfect for use in high moisture areas such as baths, showers, countertops and floors. Conforms to ANSI A108.11 for cement board attachment. Backer-On screws can be installed with a standard impact or drill/driver and T-25 Star drive bit (included with product) for cement board fastening done right.
  • 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
  • Conforms to ANSI A108.11 standards for cement board attachment
  • Return Policy

Additional Resources

From the Manufacturer

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Specifications

Dimensions

Screw Length1-5/8 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 StandardANS
Package Quantity140Product Weight (lb.)1.06 lb
Returnable90-DayThread StyleHi-Lo

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.
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Questions & Answers

35Questions
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Q:Can I use these for exterior plank siding application?
by|Nov 2, 2023
0 Answer
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Q:What type of screws should be used when the hardboard is being attached to pressure treated wood?
by|Oct 31, 2023
0 Answer
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Q:Do holes have to be pre-drilled to use these screws?
by|Sep 12, 2023
1 Answer
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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
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    Q:How many screws to a box
    by|Aug 28, 2023
    1 Answer
    Answer This Question

    A:  Hello - Thank you for your question. These Backer-On 9x1-5/8" cement board screws have 140 screws per box.

    by|Sep 15, 2023
      Showing 1-4 of 35
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      Customer Reviews

      4.7 out of 5
      (963)
      • 4.7
        out of 963 reviews
      • 91% recommend this product
      Filter by:
      Showing 1-10 of 963 reviews
      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
      Exactly what you need don't get the 1 1/2"
      Exactly what you need I use these when building a shower enclosure always have a few leftover be it a shower or tub.
      by
      • Verified Purchase
      • Recommended
      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 963 reviews

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