Simpson #8 x 1-1/4 in. Hi-Lo T25 Cement Board Screw is a professional-grade fastener engineered specifically for securing cement backerboard in tile and wet-area installations. The high-low thread design and multilayer corrosion-resistant zinc coating make these screws a dependable choice for contractors and tile installers working with HardieBacker, Durock, WonderBoard, and PermaBase cement backerboards. Whether you are setting up a shower surround, a tile floor substrate, or any other moisture-prone surface, this fastener is built to handle the demands of the application reliably.

Key Features

• T25 6-lobe drive - provides positive bit engagement that reduces cam-out and extends bit life, keeping your installation moving efficiently
• High-low thread design - alternating thread heights drive more easily through dense cement backerboard material, reducing the effort and time needed per fastener
• Ribbed wafer head with nibs - the nibs help countersink the head flush with the board surface, creating a smooth substrate that is ready for tile bonding without additional prep work
• Multilayer corrosion-resistant zinc coating - guards against rust staining in wet-area applications, protecting both the fastener and the finished installation over the long term
• Compatible with all major cement backerboards - approved for use with HardieBacker, Durock, WonderBoard, and PermaBase, giving installers flexibility across a wide range of tile projects

Why This Product

• Purpose-built for cement backerboard work - unlike general-purpose screws, the high-low thread geometry and ribbed wafer head are specifically designed for the unique demands of fastening cement board, delivering cleaner, more consistent results on tile substrate installations
• Corrosion resistance where it matters most - the multilayer zinc coating is engineered to prevent rust stains in the wet and humid environments common to bathroom, shower, and kitchen tile projects, helping protect the finished surface
• Drive system designed to reduce rework - the T25 6-lobe drive reduces bit slippage during installation, meaning fewer stripped heads and less wasted time fixing fastener errors on the job
• Trusted Simpson quality for professional applications - Simpson is a recognized name in structural and construction fasteners, and these cement board screws reflect the same commitment to consistent performance that tile and flooring professionals rely on

Specifications

• Model Number: CBHL114R200
• Screw Size: #8
• Length: 1-1/4 in.
• Head Diameter: 0.38 in.
• Head Type: Wafer Head
• Drive Type: T25 6-Lobe
• Coating Material: Coated Zinc (multilayer corrosion-resistant)
• Package Quantity: 200 count

Approved Applications

• Fastening cement backerboard in tile installation applications
• Use with HardieBacker cement backerboard
• Use with Durock cement backerboard
• Use with WonderBoard cement backerboard
• Use with PermaBase cement backerboard

What's Included

• 200 x Simpson #8 x 1-1/4" Hi-Lo T25 Cement Board Screws
• 6-lobe T25 driver bit included in package

Frequently Asked Questions

What type of backerboards are these screws compatible with?

These screws are designed for use with all cement backerboards, including HardieBacker, Durock, WonderBoard, and PermaBase.

What drive type is required for the CBHL114R200 screw?

These screws use a T25 6-lobe drive. A compatible T25 driver bit is included in the package, and the replacement driver bit reference is BIT25T-2-R2.

How does the head design help with cement board installation?

The ribbed wafer head features nibs that help countersink the screw slightly into the cement board surface, providing a flush finish that is ideal for tile installation.

What corrosion protection do these screws offer?

The screws feature a distinctive multilayer corrosion-resistant zinc coating specifically designed to prevent rust stains, making them well suited for wet-area and tile applications.

Note: Product dimensions and/or thread length may differ from picture. Please see the item description above for specifications.