Backer-On Cement Board Screw 9 × 1-1/4″ (185-Count)

Engineered for professional tile installers, the Backer-On Cement Board Screw delivers reliable performance when fastening fiber-cement backerboard to wood or light-gauge steel studs. Its patented serrated head design self-countersinks at any angle, ensuring a smooth, flush surface ready for tile and grout. The T-25 star drive recess enables rapid, one-handed installation, while the corrosion-resistant Climacoat finish prevents rust bleed-through in high-moisture areas. Conforming to ANSI A108.11 standards, these screws make cement-board attachment fast, clean, and dependable.

• Unmatched flush seating thanks to patented serrated head
• Easy, one-handed drive with T-25 star recess
• Sharp, serrated single-lead threads for immediate pickup
• Climacoat corrosion-resistant finish protects against rust
• Ideal for HardieBacker® or equivalent fiber-cement boards
• Meets ANSI A108.11 for cement-board installation

Key Features

• Patented serrated head countersinks cleanly at any angle
• Star-drive (T-25) bit recess for secure bit engagement
• Sharp gimlet point for quick penetration
• Serrated single-lead threads reduce breakout
• Corrosion-resistant Climacoat finish
• Handy-Pak packaging for easy storage and transport

⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.