The Simpson 1/4 in. x 3 in. Mushroom Head Crimp Drive Anchor from Simpson is an easy-to-install expansion anchor engineered for use in concrete and grout-filled block. The preformed curvature along the shaft creates a built-in expansion mechanism that secures the anchor in place upon driving, eliminating the need for a secondary tightening procedure and reducing overall installation time. With a mechanically galvanized carbon steel construction and a tamper-proof mushroom head, this crimp drive anchor is well-suited for fastening wood or light-gauge steel to concrete, attaching concrete formwork, and hanging overhead support for sprinkler pipes or suspended ceiling panels.

Key Features

• Unique curved shaft design that provides secure placement - the preformed curvature acts as a self-contained expansion mechanism, locking the anchor firmly in place without any secondary steps after driving.
• Speeds up anchor installation by eliminating need for additional tightening - no post-drive tightening means faster installation cycles and reduced labor on the job site.
• Mushroom head provides a tamper-proof solution - the low-profile dome head resists unauthorized removal, making it a reliable choice for exposed or security-sensitive installations.
• Mechanical galvanizing meets ASTM B695, Class 55, Type 1 - this coating standard makes the anchor appropriate for some pressure-treated wood sill plate applications, providing a level of corrosion resistance where it counts.

Why This Product

• Drive-and-done installation - because the curved shaft expands automatically upon placement, there is no need to return with a wrench or driver for secondary tightening, which translates directly into time savings on high-volume concrete fastening projects.
• Versatile across common structural applications - one anchor size handles a range of tasks including fastening wood and light-gauge steel to concrete, attaching concrete formwork, and supporting overhead systems such as sprinkler pipes and suspended ceiling panels.
• Tamper-proof mushroom head for added security - the head geometry resists removal by standard tools, making this anchor a practical choice wherever installed fasteners need to remain undisturbed after placement.
• Galvanized finish rated to a recognized coating standard - the mechanically galvanized coating meeting ASTM B695, Class 55, Type 1 gives contractors confidence that the anchor meets a defined corrosion-resistance benchmark for compatible applications such as pressure-treated wood sill plates.

Specifications

• MPN: CD25300MG
• Brand: Simpson Strong-Tie
• Size: 1/4 in. x 3 in.
• Head Type: Mushroom Head
• Material: Carbon Steel
• Coating: Mechanically Galvanized
• Finish: Mechanically Galvanized
• Galvanizing Standard: ASTM B695, Class 55, Type 1
• Packaging: Packs of 100 and Cartons of 500

Approved Applications

• Fastening wood to concrete and grout-filled block
• Attaching light-gauge steel to concrete and grout-filled block
• Attaching concrete formwork
• Hanging overhead support for sprinkler pipes
• Installing suspended ceiling panels
• Some pressure-treated wood sill plate applications (mechanically galvanized coating)

Frequently Asked Questions

What base materials is the Simpson CD25300MG 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 applications in these substrates.

Does this anchor require tightening after installation?

No. The preformed curvature along the shaft creates a built-in expansion mechanism that secures the anchor in place upon installation, completely eliminating the need for a secondary tightening procedure.

What does the mushroom head style offer compared to other head types?

The mushroom head provides a tamper-proof fastening solution. Simpson Strong-Tie also offers the Crimp Drive anchor in additional head styles - including countersunk, rod-coupler, tie-wire, and duplex - each designed to handle different specific applications.

Is the mechanically galvanized coating suitable for outdoor or corrosive environments?

The mechanical galvanizing on this anchor 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.

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