Model # 23400

Internet #100143730

Store SKU #106857

Backer-On 1-1/4 in. Zinc-Plated Steel Flat-Head Square Cement Board Screws (200-Pack)
0092097234000

Backer-On

1-1/4 in. Zinc-Plated Steel Flat-Head Square Cement Board Screws (200-Pack)

  • Deep square head allows for a confident drive
  • Countersinks for flush seating
  • Corrosion and rust resitant for long lasting durability
$8.27 /each

Frequently Bought Together

Product Overview

Use Backer-On 1-1/4 in. Zinc-Plated Steel Flat-Head Square Cement Board Screws (200-Pack) to attach cement board to wood or light-gauge steel studs. These zinc-plated screws are perfect for moist areas, such as showers and countertops. Thread designed for easy installation. No pre-drilling required.

  • Use to attach cement board to wood or light gauge steel studs
  • Ideal for use with showers, backsplashes, countertops and floors
  • Steel construction
  • Rolled gimlet drive is easy to start in dense board
  • Patented/serrated for lower installation torque
  • #2 square drive reduces cam-out
  • Rib design under .375 in. ultrathin wafer-head counter-sinks for flush-seating in boards
  • #10 diameter for increased strength in dense board
  • Zinc-plated
  • Resists corrosion

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Customer Questions & Answers

3 Questions5 Answers

Customer Questions & Answers

1-1/4 in. Zinc-Plated Steel Flat-Head Square Cement Board Screws (200-Pack)
1-1/4 in. Zinc-Plated Steel Flat-Head Square Cement Board Screws (200-Pack)

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2 answers

should I use these size for the 1/2 inch hardie backer?

This question is from 1-1/4 in. Zinc-Plated Steel Flat-Head Square Cement Board Screws (200-Pack)
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August 29, 2016
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Asked by
Nebraska
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Home Improvement Profile: DIYer
October 1, 2016
Answer: 
You can, I would use the 1 5/8 ones, just a little longer and better hold on your 2x4
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Asked by
Agua Dulce, CA
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Home Improvement Profile: DIYer
September 20, 2016
Answer: 
We used them with 1/2" cement/backer board however there is also a slightly longer 1 5/8" version in the larger #10 screw size if you are worried that the amount of the 1 1/4" screw that is in the framing underneath the backer board may not be enough.
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2 answers

How many screws to one backer board

This question is from 1-1/4 in. Zinc-Plated Steel Flat-Head Square Cement Board Screws (200-Pack)
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June 19, 2016
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Asked by
Agua Dulce, CA
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September 20, 2016
Answer: 
Depends on how many framing studs you have under the backer board and whether you are hanging it vertically or horizontally. When we attached our backer board we put the screws every 6" as we were hanging large format (2' x 1') tiles in our shower enclosure
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June 22, 2016
Answer: 
Based upon Hardiebacker and Durock manufacturer guidelines, it is recommended to user 20-30 screws per board depending on the stud spacing. Screws should fasten board 12-16" inches horizontally on center, and 8" apart vertically also on center.
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1 answer

do you have to put mortar down first or can you just put this right on sub floor

This question is from 1-1/4 in. Zinc-Plated Steel Flat-Head Square Cement Board Screws (200-Pack)
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Anonymous
September 21, 2016
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Asked by
Nebraska
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October 1, 2016
Answer: 
Mortar first, kinda like a glue. Screw/nail it down after. How many screws you have left over, just screw the board down right when you apply the thinset. Also use the 1 5/8 screws, a little better hold on your 2x4!
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Customer Reviews

Rated 4.6 out of 5 by 9 reviewers.
Rated 5.0 out of 5.0 by Easy for hanging cement board We just remodeled our bathroom and installed cement backer board on our shower/tub walls. We decided to use these specially coated cement board screws and the whole project was very easy, including creating a shower niche. I used a Bosch 18V cordless hammer drill in hammer mode at the slower speed as I found that the screws bite into the backerboard more easily with the hammer action. The screws set well and the flat shape of the head helps them sit just below the cement board surface which left a nice flat surface for the Redgard and thinset. Even when I had to set the screws close to the edge of the cement board, they went in smoothly and didn't deform the edge of the board. The screws have a square head and come with a driver bit that you can use to set them with. July 1, 2015
Rated 4.0 out of 5.0 by Overall good screws First time installing tile floor and I used these screws with a battery operated impact screw gun to lay down hardibacker boards and it was worked just fine. Self tapping so scews goes down easy. Took a star out because the heads are easily stripped when you messed up and go in at an angle... May 24, 2016
Rated 5.0 out of 5.0 by These screws are tuff. & do their job I was helping my husband put these screws into our Hardee Backerboards that are on our floors. I used a battery powered drill motor to put in 900 + screws...they all were good & had no problems with any of them. June 14, 2016
Rated 5.0 out of 5.0 by Excellent screws Best screws for hardiboard. Don't waste your money on rocker on screws. These worked perfectly. March 5, 2016
Rated 5.0 out of 5.0 by Screws Best thing to use with Durarock, holds tight and doesn't over penetrate. January 19, 2016
Rated 5.0 out of 5.0 by Wow! I used my impact driver to install cement boat for some tile that I had to lay. These grab tight and won't go anywhere once in. They are a giid price and include a bit that gave me no problems when it came to stripping. Good buy! November 3, 2015
Rated 2.0 out of 5.0 by Hardie not so hardy Package of screws included the square head bit. About 40 of the 200 screws stripped inside the screw heads. Used a new square headed bit from Hardie and it rounded off after installing 6 screws. October 17, 2014
Rated 5.0 out of 5.0 by Does the job perfectly Perfect for the job, easy to use, would definitely use again May 14, 2014
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