Skip to content
Free Local Pickup Ship to Your Hometown Store
Pro & Contractor Accounts Apply for Net Terms
100,000+ Products Trusted American Hardware Brands

Backer-On Rock-On No. 9 X 2-1/4 in. L Star Patented Serrated Head Serrated Cement Board Screws

Discover the durable Backer-On Rock-On No. 9 X 2-1/4 in. L Star Flat Head Serrated Cement Board Screws for secure, efficient cement board installations.
Backer-On MPN 23520 In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $14.99. Our online price is $16.99.
$16.99
Includes free shipping on orders over $75 · $8.99 standard below
Delivery in as little as 1–4 business days Order within for same-day shipping
Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

About Product Overview

Introducing the Backer-On Rock-On No. 9 X 2-1/4 in. L Star Flat Head Serrated Cement Board Screws, the ultimate solution for all your cement board installation needs. Designed for superior performance and durability, these screws are perfect for both professional contractors and DIY enthusiasts.

Crafted from high-quality steel and featuring a zinc-plated finish, these screws ensure long-lasting corrosion resistance, making them ideal for a variety of applications. The serrated design allows for effortless penetration into cement boards, while the flat head ensures a flush finish, giving your projects a polished look.

  • Size: No. 9
  • Length: 2-1/4 inches
  • Drive Style: Star, with driver bit included
  • Container Size: 1 package
  • Gauge: Grade quality for maximum strength

With the Backer-On Rock-On No. 9 X 2-1/4 in. L Star Flat Head Serrated Cement Board Screws, you can trust that your installations will be secure and durable. Whether you're working on a renovation or a new build, these screws are a must-have in your toolkit.

Don't compromise on quality—choose the Backer-On Rock-On No. 9 X 2-1/4 in. L Star Flat Head Serrated Cement Board Screws for your next project. Order now and experience the difference!

The Details Specifications

Brand Backer-On
SKU 5043820
UPC 092097235205
Unit 0
Case Pack Quantity 4 per case
Retail Unit Quantity 1
Unit of Measure 100 PK
Dimensions (L × W × H) 2 × 4 × 5
Weight 1 lbs
Cubic Feet 0.03733 ft³
Country of Origin TAIWAN
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare