The Simpson 1/4 in. x 4 in. Countersunk Head Crimp Drive Anchor is a carbon steel expansion anchor from Simpson engineered for fast, reliable installation in concrete and grout-filled block. The preformed curvature along the shaft creates a built-in expansion mechanism that locks the anchor firmly in place upon installation, removing the need for a secondary tightening step and keeping projects moving. The countersunk head delivers a flush, zero-profile finish suited to applications ranging from fastening wood or light-gauge steel to hanging overhead support for sprinkler pipes and suspended ceiling panels. Mechanical galvanizing meets ASTM B695, Class 55, Type 1, making it a viable choice for pressure-treated wood sill plate applications where that coating is specified.

Key Features

• Unique curved shaft design - the preformed curvature acts as a built-in expansion mechanism, securing the anchor firmly in concrete or grout-filled block without relying on a separate expansion step.
• No secondary tightening required - the anchor sets upon installation, reducing labor time and simplifying workflow on the jobsite.
• Countersunk head profile - sits flush with the substrate surface, providing a zero-profile finish ideal for applications where a clean, unobstructed face is required.
• Mechanical galvanizing meets ASTM B695, Class 55, Type 1 - satisfies the coating specification for some pressure-treated wood sill plate applications, giving installers a compliant fastener option for those assemblies.
• Carbon steel construction - provides the structural strength needed for concrete anchoring tasks such as attaching concrete formwork and installing suspended ceiling panel systems.

Why This Product

• Faster installation without sacrificing holding strength - the self-securing curved shaft eliminates the tightening procedure that slows down conventional expansion anchors, letting crews set more anchors in less time.
• Versatile head style for flush-finish applications - the countersunk design sits below or level with the work surface, making it the practical choice when fastening wood, light-gauge steel, or formwork where a protruding head would interfere.
• Coating compliance for treated-lumber assemblies - mechanical galvanizing to ASTM B695, Class 55, Type 1 meets the fastener requirements commonly specified for pressure-treated wood sill plate connections, reducing the need to source a separate anchor for those details.
• Broad application range in a single anchor style - from concrete formwork attachment to overhead sprinkler pipe support and suspended ceiling panel installation, one anchor model covers multiple common concrete anchoring tasks on the same project.

Specifications

• MPN: CD25400CMG
• Brand: Simpson Strong-Tie
• Size: 1/4 in. x 4 in.
• Head Type: Countersunk Head
• Material: Carbon Steel
• Coating: Mechanically Galvanized
• Finish: Mechanically Galvanized
• 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
• Pressure-treated wood sill plate applications where mechanical galvanizing is specified

Frequently Asked Questions

What base materials are compatible with the Simpson CD25400CMG Crimp Drive anchor?

The CD25400CMG is designed for use in concrete and grout-filled block, making it suitable for a wide range of structural and light construction applications.

Does this anchor require a secondary tightening step after installation?

No. The preformed curvature along the shaft acts as a built-in expansion mechanism that secures the anchor in place upon installation, completely eliminating the need for additional tightening and speeding up the installation process.

Is the CD25400CMG anchor suitable for outdoor or corrosive environments?

The mechanical galvanizing meets ASTM B695, Class 55, Type 1, and is intended for some pressure-treated wood sill plate applications. It is not intended for use in other corrosive or outdoor environments.

What is the head style on this anchor, and what advantage does it provide?

This anchor features a countersunk head, which provides a zero-profile solution by sitting flush with or below the surface of the fixture, making it ideal for applications where a clean, low-profile finish is required.