Simpson CB3BLGHL Fiber-Cement Board Screw (Collated) - #9 x 1-1/4 in., #3 Square Drive, C-3 Mechanically Galvanized, 1,500-Quantity by Simpson is engineered specifically for cement-board-to-wood applications involving coarse, porous, and softer materials. This collated screw is designed for use with the Quik Drive PROLDHG2 underlayment/backerboard system, delivering a clean, concealed finish through its countersinking design - making it a reliable choice for professional backerboard and underlayment installations.

Key Features

• 0.375-in. ribbed wafer head with nibs for easy countersinking
• #3 undersized square drive (2 driver bits in each box; replacement bit model BIT3SU)
• Alternating high-low threads
• Sharp point
• C-3 mechanically galvanized coating
• Straight collation
• Size: #9 x 1-1/4 in.
• Quantity: 1,500

Specifications

• Model No.: CB3BLGHL114S
• Screw Size: #9
• Length: 1-1/4 in.
• Head Type: Ribbed Wafer Head
• Drive Type: #3 Square, Undersized
• Thread Type: High/Low Threads
• TPI: 15
• Point Type: Sharp Point
• Coating: Mechanically Galvanized, C-3
• Collation Type: Straight
• Collation Angle: Straight
• Compatible Tool: Quik Drive PROLDHG2
• Packaging Quantity: 1,500
• Country of Origin: Taiwan

Approved Applications

• Cement board to wood (for coarse, porous, and softer materials)

What's Included

• 1,500 collated #9 x 1-1/4 in. CB3BLGHL screws
• 2 driver bits (replacement bit model: BIT3SU)

Frequently Asked Questions

What tool system is the CB3BLGHL114S designed to work with?

This collated screw is designed for use with the Quik Drive PROLDHG2 underlayment/backerboard system, enabling fast and consistent installation in cement-board-to-wood applications.

What type of coating does this screw have, and why does it matter for cement board applications?

The CB3BLGHL114S features a C-3 mechanically galvanized coating, which provides corrosion resistance suited to the demanding moisture-exposed environments common in cement board and backerboard installations.

What is the purpose of the high-low thread design on this screw?

The alternating high-low threads are specifically designed for fastening into coarse, porous, and softer materials such as wood substrates used in cement-board applications, promoting strong holding power while reducing material stress.

What drive bit does this screw require, and are replacement bits available?

This screw uses a #3 undersized square drive. Each box includes 2 driver bits. Replacement bits are available under model number BIT3SU.

Note: Product dimensions and/or thread length may differ from picture. Please refer to the specifications listed above for accurate product details.