The Simpson 3/16 in. x 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. The preformed curvature along the shaft creates a built-in expansion mechanism that secures the anchor firmly in place upon installation, eliminating the need for a secondary tightening procedure. Available in a mushroom head style, this zinc-plated carbon steel anchor handles a range of masonry fastening applications - from attaching wood or light-gauge steel to concrete substrates, to hanging overhead support for sprinkler pipes and installing suspended ceiling panels.

Key Features

• Unique curved shaft design - acts as a self-contained expansion mechanism, securing the anchor in concrete or grout-filled block without any follow-up tightening step
• No secondary tightening required - speeds up installation significantly, reducing labor time on masonry fastening jobs
• Mushroom head style - provides a tamper-proof fastening solution, making this anchor well suited for security-sensitive applications where unauthorized removal is a concern
• Zinc-plated carbon steel construction - delivers a corrosion-resistant finish over a strong carbon steel body, offering durability across a variety of concrete and masonry fastening applications

Why This Product

• Faster installation without extra steps - the preformed shaft curvature eliminates the need for a secondary tightening procedure, so installers can drive the anchor and move on, keeping projects on schedule
• Built-in tamper resistance - the mushroom head design resists unauthorized removal, making this crimp drive anchor a dependable choice for overhead support, ceiling panel installation, and other applications where fastener security matters
• Broad application range - one anchor design handles multiple masonry tasks, including fastening wood or light-gauge steel, attaching concrete formwork, and hanging sprinkler pipe supports, reducing the need to stock multiple anchor types
• Trusted Simpson engineering - engineered specifically for concrete and grout-filled block substrates, this expansion anchor reflects the same design discipline that professionals rely on for structural masonry connections

Specifications

• Manufacturer Part Number (MPN): CD18400M
• Brand: Simpson Strong-Tie
• Size: 3/16 in. x 4 in.
• Head Type: Mushroom Head
• Material: Carbon Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• 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
• Tamper-proof anchoring applications requiring a low-profile mushroom head

Frequently Asked Questions

What substrate is the Simpson CD18400M Crimp Drive anchor designed for?

The Simpson Strong-Tie Crimp Drive anchor is specifically designed for use in concrete and grout-filled block, making it a reliable choice for masonry fastening applications.

Does the CD18400M require a secondary tightening step after installation?

No. The preformed curvature along the shaft acts as the expansion mechanism, securing the anchor in place upon installation and eliminating the need for any additional tightening procedure.

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

The mushroom head design provides a tamper-proof fastening solution, making it ideal for applications where security and resistance to unauthorized removal are important considerations.

What materials is the CD18400M anchor made from?

This anchor is constructed from carbon steel and features a zinc-plated finish, which provides a layer of corrosion resistance for the anchor body.

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