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#9 X 1-1/4-Inch Rock-On Green Zinc-Plated Flat Head Cement Board Screws 185-Pack
- Mfg.#
- 23500
- Sku#
- 4074688
- Flush seating in all cement board when angle driven
- Ability to attach close to edge in all cement boards without fractures or blowouts
- Stikfit™ recess for one-handed driving, while eliminating cam-outs and wobbling
- Premium corrosion-resistant finish to prevent rusting from bleeding into grout
- Patented sharp point offers immediate pick-up and eliminates the need to pre-drill
* Estimated stock levels as of Sat, Apr 11, 2026. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availability of items marked as Limited Stock.
Description
Backer-On Rock-On 1-1/4 in. cement board screws are designed for attaching Hardie Backer or equivalent fiber cement backer board to wood or light gauge steel studs. Backer-On Rock-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 Stikfit for 1-handed installation. Backer-On Rock-On screws feature a Climacoat corrosion-resistant finish that prevents rust from bleeding into the 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 Rock-On screws can be installed with a standard impact or drill/driver and product) for cement board fastening done right.
Specifications
General
| Applicable Materials | Drywall, Metal, Wood |
|---|---|
| Application | Cement Board, Multi-Purpose |
| Color | Green |
| Color Family | Green |
| Drive Style | Star |
| Driver Bit Size | T25 |
| Finish | Zinc Climacoat |
| Head Type | Flat |
| Includes | T25 Driver Bit |
| Material | Steel |
| Pack Qty | 185 |
| Point Type | Sharp |
| Thread Size | 9 |
| Thread Type | Hi-Lo |
| Type | Cement Board Screws |
Dimensions
| Diameter | 11/64 in |
|---|---|
| Length | 1.25 in |
| Weight | 1.16 lb |
| Width | 2.42 in |
Manufacturing Details
The following information is subject to change without notice
| Shop USA | No |
|---|
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