The Simpson 1/4 in. x 3 in. Countersunk Head Crimp Drive Anchor is an easy-to-install expansion anchor from Simpson engineered for use in concrete and grout-filled block. Built from carbon steel with a mechanically galvanized finish, this anchor features a preformed curvature along the shaft that acts as a built-in expansion mechanism, securing the anchor in place upon installation without any secondary tightening procedure. The countersunk head delivers a flush, zero-profile result, making this anchor a reliable fastening solution for applications ranging from attaching concrete formwork to hanging overhead support for sprinkler pipes and suspended ceiling panels.

Key Features

• Unique curved shaft design - creates a self-securing expansion mechanism so the anchor locks in place on contact, eliminating extra steps and reducing installation time on the job site.
• No secondary tightening required - the preformed curvature does the work automatically, letting crews move faster without sacrificing holding strength in concrete or grout-filled block.
• Countersunk head provides a zero-profile solution - the head sits flush with the surface after installation, keeping the work area clean and unobstructed for applications where a low profile is critical.
• Mechanically galvanized finish meeting ASTM B695, Class 55, Type 1 - provides corrosion resistance appropriate for select pressure-treated wood sill plate applications, so the right coating is matched to the right job from the start.
• Five available head styles across the Crimp Drive line - the countersunk configuration is one of multiple options designed to handle distinct tasks, including fastening wood or light-gauge steel, attaching concrete formwork, and hanging overhead support for sprinkler pipes or suspended ceiling panels.

Why This Product

• Faster installation without cutting corners - because the curved shaft eliminates the need for a secondary tightening procedure, crews can drive and move on, reducing labor time on repetitive concrete anchoring tasks without compromising the security of each fastened connection.
• Purpose-built for concrete and masonry work - engineered specifically for concrete and grout-filled block, this expansion anchor is a dependable choice for structural fastening in masonry construction, including formwork attachment and suspended ceiling or sprinkler pipe installations.
• Flush finish where surface appearance matters - the countersunk head seats completely flush, making this anchor the right pick for applications where a protruding fastener head would interfere with fit, function, or finish work.
• Coating matched to real-world application requirements - the mechanically galvanized carbon steel construction meets a recognized ASTM standard, giving buyers confidence that the anchor's corrosion protection aligns with its intended use in appropriate pressure-treated wood sill plate environments.

Specifications

• MPN: CD25300CMG
• Brand: Simpson Strong-Tie
• Size: 1/4 in. x 3 in.
• Head Type: Countersunk Head
• Material: Carbon Steel
• Coating: Mechanically Galvanized
• Finish: Mechanically Galvanized
• Packaging: Packs of 100 and Cartons of 500

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 appropriate)

Frequently Asked Questions

What type of base material is the Simpson CD25300CMG Crimp Drive anchor designed for?

The Simpson Strong-Tie Crimp Drive anchor is designed for use in concrete and grout-filled block, making it suitable for a wide range of structural fastening tasks in masonry construction.

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 any secondary tightening procedure.

Is the CD25300CMG suitable for outdoor or highly corrosive environments?

No. The mechanical galvanizing meets ASTM B695, Class 55, Type 1, and is intended for some pressure-treated wood sill plate applications only. It is not for use in other corrosive or outdoor environments.

What benefit does the countersunk head provide on this anchor?

The countersunk head provides a zero-profile solution, meaning the head sits flush with or below the surface of the fixture material once installed, making it ideal for applications where a smooth, unobstructed surface is required.

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