No. 9 X 1-5/8 In. L Star Flat Head Serrated Cement Board Screws

Backer-On No. 9 x 1-5/8 in. Star Flat Head Cement Board Screws are specialized fasteners designed for securing cement board in construction and renovation projects. The flat head design allows for flush installation, while serrated threads provide superior grip and holding power on cement board substrates. These screws are ideal for both indoor and outdoor applications, including bathrooms, kitchens, and other moisture-prone areas.

The self-drilling and self-tapping design eliminates the need for pre-drilling, saving time and effort on your project. Steel construction with zinc plating ensures these fasteners resist corrosion, making them suitable for wet environments and long-term durability.

Features and Benefits

• Flat Head Design: Creates a flush finish when installed, ideal for applications requiring a smooth surface.
• Serrated Threads: Superior adhesion to cement board substrate ensures screws stay securely in place.
• Self-Drilling and Self-Tapping: No pre-drilling required, making installation faster and more efficient.
• Corrosion Resistant: Zinc-plated steel construction provides durability in wet environments.
• Right-Sized Fastener: Number 9 gauge offers optimal holding power for cement board applications.
• Star Drive: Compatible with star drive bits for installation.

Specifications

• Brand: Backer-On
• Model: 23515
• Size: No. 9 x 1-5/8 in.
• Head Style: Flat head
• Drive Type: Star
• Thread Type: Serrated
• Material: Steel, zinc-plated
• Application: Cement board fastening