Skip to main content
Cement Board Screws Rock-On No. 9 X 2-1/4" L Star Flat Head Zinc-Plated

Roll over image to zoom in

  • Product Features

  • Product Overview

  • Related Videos

  • Reviews

  • Questions & Answers

Backer-On 23520 Cement Board Screws Rock-On No. 9 X 2-1/4" L Star Flat Head Zinc-Plated

Item #: 23520 by ITW GLOBAL BRANDS

UPC #: 092097235205

See reviewsSee reviews
See reviews summary
In Stock

$16.85

/package
SAVE UP TO 1.69
Buying in bulk
QUICK SHIPPING*Usually ships in 1 business dayIn stock: 1430 units available
QTY
–
+
+ Add to Wishlist
Buy in Bulk & Save - See HowWatch Now
Get Volume Pricing

Shop with Confidence

30 Days Easy Return. We are the largest supplier of the most adaptable, personalized hardware in the industry. We work hard to ensure you're satisfied with our products.

Safe Payment
Features

Product Type

Cement Board Screws

Velocity

N

Sub Brand

Rock-On

Self Tapping

Yes

Returnable

Yes

Hazardous Material

No

Each Weight

1.040 LB

Driver Bit Included

Yes

Defective Code

A

Callout Size

No. 9

Indoor or Outdoor

Indoor

Packaging Type

Clamshell

Self Drilling

Yes

Number in Package

100 pk

Drive Style

Star

Color

Green

Head Type

Flat Head

Length

2-1/4"

Application

Multi-Purpose

Material

Steel

Thread Type

Serrated

Finish

Zinc-Plated

Height

5.38

Width

3.50

Country Origin Code

TW

Thread Size

9

Package Quantity

100 PK

Drive Size

T25

Nomenclature

23520 CEM BRD SCREW NO9X2-1/4

Point Type

Sharp

Product Overview
Backer-On Rock-On 2-1/4 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 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 for cement board fastening done right.