The Simpson Strong-Tie CSD 1/4 in. x 2-1/2 in. Countersunk Split-Drive Anchor is a one-piece mechanical expansion anchor engineered for fast, reliable installation into concrete, grout-filled block, and stone. As the anchor is driven into the pre-drilled hole, the split-type expansion mechanism on the working end compresses and exerts force against the walls of the hole, creating a secure hold without the need for adhesives or secondary components. The countersunk head design allows for a flush, smooth surface finish when attaching wood or light gauge steel to concrete and grout-filled block surfaces, making it a trusted choice for structural applications where a clean profile is essential.

Key Features

• One-piece split-drive anchor with a built-in expansion mechanism that compresses against the hole wall upon installation
• Countersunk head allows for a flush, smooth surface when attaching wood or light gauge steel to concrete and grout-filled block
• Can be installed in concrete, grout-filled block, and stone
• Made from zinc-plated carbon steel for durability in appropriate environments
• Requires a 1/4 in. drill bit for installation
• Sized at 1/4 in. diameter x 2-1/2 in. length
• Intended for use in dry, interior, and non-corrosive environments only

Specifications

• Brand: Simpson Strong-Tie
• MPN: CSD25212
• Diameter: 1/4 in.
• Length: 2-1/2 in.
• Head Type: Countersunk Head
• Head Diameter: 1/2 in.
• Drill Bit Diameter: 1/4 in.
• Material: Carbon Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Packaging: Packs of 100 and Cartons of 500
• Country of Origin: Taiwan

Approved Applications

• Concrete
• Grout-filled block
• Stone
• Attaching wood to concrete and grout-filled block surfaces
• Attaching light gauge steel to concrete and grout-filled block surfaces
• Dry, interior, and non-corrosive environments only

Frequently Asked Questions

What base materials can the CSD25212 Split-Drive Anchor be installed into?

The CSD25212 Split-Drive Anchor can be installed into concrete, grout-filled block, and stone. It is not intended for use in hollow CMU or other non-solid base materials without grouting.

What size drill bit is required to install this anchor?

A 1/4 in. drill bit is required to create the pilot hole for the CSD25212 Split-Drive Anchor prior to installation.

Is this anchor suitable for outdoor or corrosive environments?

No. The CSD25212 is finished with a zinc-plated coating and is designed for use in dry, interior, and non-corrosive environments only. It should not be used in wet, exterior, or chemically aggressive conditions.

How does the split-drive expansion mechanism work?

As the anchor is driven into the pre-drilled hole, the split-type expansion mechanism on the working end compresses and exerts outward force against the walls of the hole, creating a secure mechanical hold without the need for adhesives or additional hardware.

Note: Product dimensions may differ from picture. Please see the item description above for specifications.