The Simpson 1/4 in. x 1 1/4 in. Mushroom Head Crimp Drive Anchor is an easy-to-install expansion anchor from Simpson engineered for use in concrete and grout-filled block. A preformed curvature along the shaft creates a built-in expansion mechanism that locks the anchor firmly in place once driven, eliminating the need for any secondary tightening procedure and helping crews work faster without sacrificing holding reliability. With five available head styles across the Crimp Drive line, this mushroom head version is particularly well-suited for applications requiring a tamper-proof connection - from 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 - the preformed curvature acts as a self-contained expansion mechanism, securing the anchor firmly in concrete and grout-filled block without additional steps after installation.
• No secondary tightening required - once driven, the anchor is set, reducing installation time and labor cost on high-volume fastening tasks.
• Mushroom head style - provides a tamper-proof solution that resists unauthorized removal, making it a smart choice for overhead, formwork, and security-sensitive anchoring applications.
• Zinc-plated carbon steel construction - the zinc plating delivers a layer of corrosion resistance over a strong carbon steel body, suited to typical concrete and block anchoring environments.
• 1/4 in. x 1 1/4 in. size - a compact yet capable dimension compatible with the 1/4 in. drill bit diameter required for proper installation.

Why This Product

• Streamlined installation saves real time on the job - the self-expanding curved shaft eliminates the back-and-forth of tightening fasteners after driving, letting installers move efficiently across concrete and grout-filled block substrates.
• Built-in tamper resistance without extra hardware - the mushroom head delivers a secure, tamper-proof anchoring point for overhead and accessible locations like suspended ceiling panels and sprinkler pipe hangers, with no additional locking components needed.
• Versatile across multiple trades and applications - a single anchor handles wood and light-gauge steel fastening, concrete formwork attachment, and hanging overhead support, reducing the number of fastener types needed on a job site.
• Trusted Simpson engineering in a zinc-plated finish - carbon steel construction with a zinc-plated coating provides the structural backbone and corrosion protection expected from a purpose-built concrete expansion anchor.

Specifications

• Manufacturer Part Number (MPN): CD25114M
• Brand: Simpson Strong-Tie
• Size: 1/4 in. x 1-1/4 in.
• Head Type: Mushroom Head
• Material: Carbon Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Packaging: Packs of 100 and Cartons of 1600

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

Frequently Asked Questions

What base materials is the Simpson CD25114M Crimp Drive anchor designed for?

The Simpson Strong-Tie CD25114M Crimp Drive anchor is specifically designed for use in concrete and grout-filled block applications.

Why does this anchor not require secondary tightening after installation?

The anchor features a preformed curvature along its shaft that acts as a built-in expansion mechanism. Once driven into place, this curved shaft design secures the anchor firmly without the need for any additional tightening procedure.

What advantage does the mushroom head style provide?

The mushroom head on the CD25114M provides a tamper-proof solution, making it well-suited for applications where added security and resistance to unauthorized removal are important.

What material and protective finish does this anchor use?

The CD25114M anchor is constructed from carbon steel and features a zinc-plated finish, providing a layer of corrosion resistance for use in typical concrete and block anchoring applications.

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