#9 x 1-5/8 in. Serrated Flat Head Star Drive Cement Board Screws (140-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
- See More Details
Frequently Bought Together
Price:
$938
Product Overview
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
Info & Guides
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
Compare Similar Drywall Screws
 |  |  | | |
| Brand | Grip-Rite | Rock-On | Backer-On | Backer-On |
| Name | #6 x 1-1/4 in. Philips Bugle-Head Coarse Thread Sharp Point Drywall Screws (1 lb./Pack) | #9 x 1-5/8 in. Serrated Flat Head Star Drive Cement Board Screws (140-Pack) | #9 x 2-1/4 in. Serrated Flat Head Star Drive Cement Board Screws (100-Pack) | #9 x 1-5/8 in. Serrated Flat Head Star Drive Cement Board Screws (140-Pack) |
| Price | $597 | $873 | $894 | $938 |
| Ratings | (616) | (181) | (77) | (236) |
| Screw Length | 1-1/4 in | 1-5/8 in | 2-1/4 in | 1-5/8 in |
| Size | #6 | #9 | #9 | #9 |
| Drive Style | Phillips | Star | Star | Star |
| Head Style | Bugle Head | Flat Head | Flat Head | Flat Head |
| Fastener/Connector Material | Steel | Steel | Steel | Steel |
| Features | Coated | Coated,Self Drilling,Self Tapping | Coated,Self Drilling,Self Tapping | Coated,Self Drilling,Self Tapping |
| View Product | View Product | View Product | View Product |
Compare Similar Drywall Screws
| | | | |
| Brand | Grip-Rite | Rock-On | Backer-On | Backer-On |
| Name | #6 x 1-1/4 in. Philips Bugle-Head Coarse Thread Sharp Point Drywall Screws (1 lb./Pack) | #9 x 1-5/8 in. Serrated Flat Head Star Drive Cement Board Screws (140-Pack) | #9 x 2-1/4 in. Serrated Flat Head Star Drive Cement Board Screws (100-Pack) | #9 x 1-5/8 in. Serrated Flat Head Star Drive Cement Board Screws (140-Pack) |
| Price | $597 | $873 | $894 | $938 |
| Ratings | (616) | (181) | (77) | (236) |
| Screw Length | ||||
| Size | ||||
| Drive Style | ||||
| Head Style | ||||
| Fastener/Connector Material | ||||
| Features | ||||
| View Product | View Product | View Product | View Product |
Specifications
Dimensions
Screw Length
1-5/8 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
Finish Family
Zinc
Head Style
Flat Head
Included
Driver Bit
Interior/Exterior
Interior
Measurement Standard
SAE
Package Quantity
140
Product Weight (lb.)
1.06
Returnable
180-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
6Questions14Answers
I had to level out some dips in my old bathroom floor. Will these bad boys go through the backer ...
Asked by Me July 26, 20174
AnswersThese are made for Hardy plank like on your gargae but they also make one for hardy planking like in a shower and they are great screws
Can the Backer-On cement board screws be used in Pressure Treated lumber without corroding? Inclu...
Asked by Backyardhack September 13, 20173
AnswersNo, the chemical in treated lumber is extremely corrosive and take special screws
Please confirm these are alkali-resistant screws.
Asked by Polly February 3, 20203
AnswersYou should be fine. They are a ceramic coated screw.
Will they work on metal studs ? I have 1/2 wonderboard lite omto attach and there is a greenboard behind it on the metal stud
Asked by Sam December 16, 20182
AnswersYes, Backer-On screws are able to self-drill into steel studs from 26-20 Gauge thick.
Are these suitable as drywall screws? Finding limited options for corrosion resistant screws in t...
Asked by Anro15 December 12, 20201
AnswerYes, Backer-On screws are suitable for attaching drywall.
How many pounds of screws would I need how many pounds would I needfor 950 square feet of quarter inch hardibacker
Asked by February 14, 20191
AnswerAt 950 square feet you will need roughly 64 sheets at 15 sq. ft. each; each sheet requires roughly 50 screws per sheet which is w total of 3,200 screws. At roughly 575 per package you will need 6 packages to install your hardback properly.
Customer Reviews
Overall Ratings
These screws were easy to use and work well with the Hardibacker board. They drive down into the...
May 16, 2020
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.
These screws worked as expected. Most screw heads countersunk the first time. The screws that wer...
November 5, 2019
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.
Excellent countersink desgin, Durable anti corosive finish, reliable star head drive tip included...
January 3, 2019
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.
Excellent product. Very reliable. Years ahead of phillips head screws.
May 29, 2018
Excellent product. Very reliable. Years ahead of phillips head screws.
Excellent for All Cementitious board
April 24, 2018
Excellent for All Cementitious board
Great Product.
March 6, 2018
Great Product.
the screws were ideal for their application, and I had...
January 17, 2021
the screws were ideal for their application, and I had none strip with the provided torx bit.
Rating provided by a verified purchaser...
January 17, 2021
Rating provided by a verified purchaser
Rating provided by a verified purchaser...
January 17, 2021
Rating provided by a verified purchaser
Always use these great screws and the bit is great...
January 16, 2021
Always use these great screws and the bit is great too!
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