Backer-On Rock-On 1-5/8 in. cement board screws are designed for attaching Hardie Backer or equivalent fiber cement backerboard 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 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 T-25 Star drive bit (included with product) for cement board fastening done right.
Brand Name: Backer-On
Sub Brand: Rock-On
Callout Size: No. 9
Length: 1-5/8 in.
Drive Style: Star
Head Type: Flat Head
Thread Type: Serrated
Product Type: Cement Board Screws
Number in Package: 575 pk
Driver Bit Included: Yes
Color: Green
Indoor or Outdoor: Indoor
Self Drilling: Yes
Finish: Zinc-Plated
Packaging Type: Bucket
Application: Multi-Purpose
Material: Steel
Self Tapping: Yes

Backer-On Rock-On No. 9 X 1-5/8 in. L Star Flat Head Serrated Cement Board Screws 575 pk