The Simpson 1/4 in. x 3-1/2 in. Mushroom Head Crimp Drive Anchor is an easy-to-install expansion anchor engineered by Simpson for use in concrete and grout-filled block. The preformed curvature along the shaft creates an expansion mechanism that secures the anchor in place and eliminates the need for a secondary tightening procedure, keeping installations fast and straightforward. The mushroom head profile delivers a tamper-proof fastening solution suited for a wide range of structural and mechanical applications, including fastening wood or light-gauge steel, attaching concrete formwork, hanging overhead support for sprinkler pipes, and securing suspended ceiling panels.

Key Features

• Unique curved shaft design - creates a reliable expansion mechanism that locks the anchor securely in place without any post-installation tightening, reducing labor time on every installation
• No secondary tightening required - the preformed curvature does the work automatically, streamlining the installation process and minimizing the steps needed to complete a fastening
• Mushroom head profile - provides a tamper-proof fastening solution, making this anchor a dependable choice for applications where security and resistance to tampering are important
• Zinc-plated carbon steel construction - the zinc plating adds a layer of corrosion resistance over the carbon steel body, helping the anchor hold up in typical concrete and block fastening environments
• Five available head styles - the Crimp Drive anchor platform is designed to handle different applications, giving contractors flexibility across wood, light-gauge steel, formwork, and overhead support installations

Why This Product

• Faster installations with no extra steps - because the curved shaft expansion mechanism eliminates the need for a secondary tightening procedure, crews can drive the anchor and move on immediately, cutting down overall installation time on concrete and grout-filled block projects
• Built-in tamper resistance - the mushroom head design is not just functional but also security-conscious, making this anchor a practical choice for overhead support, suspended ceiling panels, and any application where fastener tampering is a concern
• Versatile across multiple applications - from attaching concrete formwork to hanging sprinkler pipe support, a single anchor model handles a broad range of fastening tasks in concrete and grout-filled block, reducing the need to stock multiple anchor types
• Dependable material and finish combination - zinc-plated carbon steel provides a balance of strength and corrosion resistance that suits the demanding conditions of concrete fastening applications

Specifications

• Model Number (MPN): CD25312M
• Brand: Simpson Strong-Tie
• Size: 1/4 in. x 3-1/2 in.
• Head Type: Mushroom Head
• Material: Carbon Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Packaging: Packs of 100 and Cartons of 400

Approved Applications

• Fastening wood or light-gauge steel to concrete and grout-filled block
• Attaching concrete formwork
• Hanging overhead support for sprinkler pipes
• Installing suspended ceiling panels
• Tamper-resistant fastening applications requiring a mushroom head profile

Frequently Asked Questions

What base materials is the Simpson CD25312M Crimp Drive anchor designed for?

The Simpson Strong-Tie Crimp Drive anchor is designed for use in concrete and grout-filled block, making it well-suited for a wide range of structural and mechanical fastening applications in these materials.

Does the CD25312M require a secondary tightening step after installation?

No. The preformed curvature along the shaft creates an expansion mechanism that secures the anchor in place upon installation, completely eliminating the need for a secondary tightening procedure and speeding up the overall installation process.

What is the purpose of the mushroom head on the CD25312M anchor?

The mushroom head design provides a tamper-proof fastening solution. Its low-profile shape is particularly effective for attaching wood or light-gauge steel to concrete and grout-filled block in applications where security and resistance to tampering are important.

What material and finish is the Simpson CD25312M anchor made from?

The CD25312M anchor is constructed from carbon steel with a zinc-plated finish, providing a corrosion-resistant coating suitable for the anchor's intended installation environments.

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