Model # 23406

Internet #300661899

Store SKU #1002419405

Backer-On #9 x 1-1/4 in. Serrated Head Star Drive Cement Board Screws (750-Pack)
0092097234062

Backer-On

#9 x 1-1/4 in. Serrated Head Star Drive Cement Board Screws (750-Pack)

  • Serrated head for flush seating
  • Star drive with T-25 bit for one-handed installation
  • Serrated single lead thread and sharp point for immediate pick up
$ 26 28
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Frequently Bought Together

Frequently Bought Together

Product Overview

  • Serrated head for flush seating
  • Star drive with T-25 bit for one-handed installation
  • Serrated single lead thread and sharp point for immediate pick up
The Backer-On 1-1/4 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 one-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 one-handed installation and eliminates cam-outs
  • Patented sharp point offers immediate pick-up and eliminates the need to pre-drill
  • Serrated thread forms require less torque for faster installation
  • 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

Product Overview

  • Serrated head for flush seating
  • Star drive with T-25 bit for one-handed installation
  • Serrated single lead thread and sharp point for immediate pick up
Model #: 23406
Sku #: 1002419405
Internet #: 300661899

The Backer-On 1-1/4 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 one-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 one-handed installation and eliminates cam-outs
  • Patented sharp point offers immediate pick-up and eliminates the need to pre-drill
  • Serrated thread forms require less torque for faster installation
  • 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

Info & Guides

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Brand Rock-On Backer-On Rock-On Backer-On
Name #9 x 1-1/4 in. Serrated Head Star Drive Cement Board Screws (185-Pack) #9 x 1-1/4 in. Serrated Head Star Drive Cement Board Screws (185-Pack) #9 x 1-1/4 in. Serrated Head Star Drive Cement Board Screws (750-Pack) #9 x 1-1/4 in. Serrated Head Star Drive Cement Board Screws (750-Pack)
Price
$7.98
$8.86
$24.38
$26.28
Ratings (45) (87) (45) (87)
Size #9 #9 #9 #9
Screw Length 1-1/4 in 1-1/4 in 1-5/8 in 1-1/4 in
View Product View Product View Product View Product

Specifications

Dimensions

Screw Length
1-1/4 in
Thread Pitch
0

Details

Color Family
Green
Drive Style
Star
Fastener Plating
Zinc
Fastener Type
Drywall Screw
Fastener/Connector Material
Steel
Features
Coated,Self Drilling,Self Tapping
Finish
Zinc-plated
Head Style
Flat Head
Included
Driver Bit
Interior/Exterior
Interior
Measurement Standard
SAE
Package Quantity
750
Product Weight (lb.)
4.66 lb
Returnable
90-Day
Size
#9

Warranty / Certifications

Manufacturer Warranty
ITW 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.

Specifications

Dimensions

Screw Length
1-1/4 in
Thread Pitch
0

Details

Color Family
Green
Drive Style
Star
Fastener Plating
Zinc
Fastener Type
Drywall Screw
Fastener/Connector Material
Steel
Features
Coated,Self Drilling,Self Tapping
Finish
Zinc-plated
Head Style
Flat Head
Included
Driver Bit
Interior/Exterior
Interior
Measurement Standard
SAE
Package Quantity
750
Product Weight (lb.)
4.66 lb
Returnable
90-Day
Size
#9

Warranty / Certifications

Manufacturer Warranty
ITW 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

I cannot get the serrated head start drive cement screws into the backer board. I have even tried...

I cannot get the serrated head start drive cement screws into the backer board. I have even tried to put a nail in first.....and can't get the nail in either. Any ideas? Thanks! Lisa
Asked by: Iisahandy
it does take a little pressure to get them to start in hardie board, but stick with it. A good drill driver is necessary of course...
Answered by: Mark
Date published: 2018-09-11

How many square feet of 1/4" backboard would this box cover?

How many square feet of 1/4" backboard would this box cover?
Asked by: doorguy
Seems like it was from 60-75 screws per 3x5 board. So you might get 2 1/2 to 3 boards out of a box.
Answered by: VJ
Date published: 2018-09-06

I am attaching Hardie backer to 1 x 2 furring strips on concrete block. I measured the thickness...

I am attaching Hardie backer to 1 x 2 furring strips on concrete block. I measured the thickness of the furring strip with a caliper and it reads 0.71 inches. If the backer board is 0.5 inches, that totals 1.21". Is this going to be a problem? The screws would appear to be 0.04" too long. Thats just a bit more than 1/32". Will the screws bite into the concrete block, or am I going to end up with all the screw heads sticking out 1/32"?
Asked by: jjb
I'm not an expert but the screws should be set a bit below the surface of the backer board. I would be concerned with the screws pushing the strips away from the concrete and ending up with a wall that's not flat
Answered by: Roger
Date published: 2019-03-02

Has anyone used these to fasten cbu to steel studs (20 gauge or thicker)? Did they self-tap as stated?

Asked by: CitizenSnips
No we used on wood
Answered by: Gitterdone2
Date published: 2018-05-12
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Customer Reviews

#9 x 1-1/4 in. Serrated Head Star Drive Cement Board Screws (750-Pack) is rated 4.7 out of 5 by 86.
Rated 3 out of 5 by from Sorry, but I can't give these a great rating. Experienced builder. First time using Hardie boar... Sorry, but I can't give these a great rating. Experienced builder. First time using Hardie board 1/2" for shower walls with Backer-On. A remodel and therefore working with aged fir studs. Backer-on screws went in well, but are very difficult to finish-sink to flush. I'm a builder that honors manufacturer's specifications. For me every job is by the book. Engineers know stuff. Engineers welcome feedback. You cant sink these screws to flush in my 1/2" Hardiebacker board surfaces. I couldn't. I went to countersinking every location a touch with a 5/16 drill. Otherwise the B-O's just would not go to flush. You kinda know when the hammer- drill is working it yet not making progress; and you're expecting that "snap". I didn't care to go there and these suckers refused to give in to flush on their own. I may continue to use them because I honor specifications, like the product, and want the warranty. But I have to do what I see necessary to set Backer-On fasteners flush as required.
Date published: 2018-06-07
Rated 5 out of 5 by from These screws are the best thing for proper installation of 1/4" Hardie-backer board; period. The ... These screws are the best thing for proper installation of 1/4" Hardie-backer board; period. The old style, with the square drive head, were prone to stripping before being fully set and mushrooming. The newly redesigned screw with the star drive head and improved serration make those previous complaints a thing of the distant past. I exclusively used these when installing 1/4" Hardie backer board for tile installs, with the mortar bed underneath as per the manufacturer's recommendation, and the results are great. Sure occasionally the coating will clog the head making driving the screw difficult or impossible, but that is only a relative few from the masses I have driven. The serration helps set the screw perfectly 99 out of 100 times; no more mushrooming. The engineers got it correct with this redesign; I have reduced install time by 25% easily without the stripping problem.
Date published: 2017-06-23
Rated 5 out of 5 by from Perfect for attaching cement board. Used less expensive phillips head screws in a pinch and they... Perfect for attaching cement board. Used less expensive phillips head screws in a pinch and they are much harder to use (tended to strip out and not sink level or lower with the cement board).
Date published: 2019-02-26
Rated 5 out of 5 by from I like these screws because the bit doesn't slip much... I like these screws because the bit doesn't slip much which makes for much faster installation. Looked closely at these and the rock-on and couldn't find a difference besides the color.
Date published: 2018-12-18
Rated 5 out of 5 by from Any screws has them own function. This is the best... Any screws has them own function. This is the best for hardie backer or durorock.
Date published: 2019-03-05
Rated 5 out of 5 by from I am very happy wit the #9 Thanks have a... I am very happy wit the #9 Thanks have a happy holiday to all home depot workers
Date published: 2018-12-18
Rated 5 out of 5 by from I never used these before my last project and they... I never used these before my last project and they really work great
Date published: 2019-02-12
Rated 5 out of 5 by from The screws perform as expected. They met all project requirements.... The screws perform as expected. They met all project requirements.
Date published: 2019-02-19
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