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Backer-On

#9 X 1-5/8-Inch Rock-On Flat Head Star Drive Cement Board Screws 140-Pack

Mfg.#
23510
Sku#
4074704
  • 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

* 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

Rock-On 1-5/8-inch cement board screws are the premier fastening solutions for installing Durock WonderBoard or any equivalent cement boards. The patented serrated head design countersinks for flush seating at any angle, providing a smooth surface for tile installation. The star drive recess combined with Stikfit bit supports easy one-handed installations and eliminates cam outs. The premium corrosion resistant finish prevents rust from bleeding into grout, making Rock-On screws the perfect choice for use in high moisture areas such as bathrooms and kitchens.

Specifications

General

Applicable Materials Cement Board to Wood
Coating Climacoat
Color Green
Color Family Green
Drive Style Torx
Drive Type Star
Driver Bit Size T25
Finish Polymeric Zinc
Head Style Flat
Includes Driver Bit
Indoor/Outdoor Indoor
Material Carbon Steel
Pack Qty 140
Point Type Self-Drill
Thread Pitch 2.6 mm
Thread Size 9.8 TPI
Thread Type Hi-Lo
Type Cement Board Screw

Dimensions

Diameter #9
Length 1-5/8 in
Weight 1.06 lb

Manufacturing Details
The following information is subject to change without notice

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