Simpson 1/2 in. Coil-Thread Drop-In Anchor DIAB50C is a displacement-controlled expansion anchor from Simpson engineered for fast, accurate installation into concrete base materials. Featuring improved geometry for smooth and accurate placement, this internally threaded anchor accepts 1/2 in. coil-thread rod and sets with 40% fewer hammer hits than the previous drop-in anchor design - reducing physical effort on the job while a built-in positive-set marking system confirms proper placement every time.

Key Features

• Sets with 40% fewer hammer hits than the previous design - faster installation means less effort per anchor and more anchors set per shift, improving overall jobsite productivity.
• Positive-set marking system with indication marker - clearly shows when the anchor is properly set, removing guesswork and helping ensure code-compliant, reliable connections.
• Internally threaded coil-thread design for 1/2 in. coil-thread rod - provides a secure, purpose-matched connection for coil-thread rod applications without the need for adapters or modifications.
• Improved geometry for smooth and accurate installation - the enhanced setting capability requires minimum effort, supporting quick and economical placement in concrete.
• Zinc-plated carbon steel construction - provides a corrosion-resistant finish suitable for general concrete anchoring applications in dry or protected environments.
• Compatible with DIABST hand-setting tool or power-setting tool - installs with model DIABST50 or DIABST50-SDS, giving crews the flexibility to choose manual or powered installation based on project scale.

Why This Product

• Engineered for speed without sacrificing accuracy - the redesigned geometry and reduced hammer-hit requirement cut installation time compared to the previous drop-in anchor design, making this anchor a practical choice for concrete anchoring tasks where efficiency matters.
• Built-in confirmation of proper set - the positive-set marking system takes the uncertainty out of installation, giving crews and inspectors a clear visual indicator that each anchor has been correctly placed before rod engagement.
• Versatile tool compatibility - support for both a hand-setting tool and a power-setting tool means this displacement-controlled expansion anchor fits naturally into a variety of workflows, from single-point installations to high-volume concrete anchoring projects.
• Trusted Simpson engineering in a coil-thread format - designed specifically for 1/2 in. coil-thread rod connections, this internally threaded drop-in anchor delivers the purpose-built fit that helps maintain connection integrity in suspended systems, form ties, and other rod-based applications.

Specifications

• MPN: DIAB50C
• Brand: Simpson Strong-Tie
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Length: 2 in.
• Thread Length: 3/4 in.
• TPI: 6
• Bolt/Rod Diameter: 1/2 in.
• Drill Bit Diameter: 5/8 in.
• Thread Type: Coil-Thread
• Packaging: Packs of 50 and Cartons of 200

Frequently Asked Questions

What setting tools are compatible with the DIAB50C anchor?

The DIAB50C installs with the DIABST hand-setting tool model DIABST50 or the power-setting tool model DIABST50-SDS.

How do I know when the DIAB50C anchor is properly set?

The anchor features a positive-set marking system with an indication marker at the top of the anchor that clearly shows when proper installation has taken place.

What drill bit size is required to install the DIAB50C?

A 5/8 in. drill bit diameter is required when preparing the hole for the DIAB50C drop-in anchor.

What rod size does the DIAB50C accept?

The DIAB50C is designed for use with 1/2 in. coil-thread rod, with 6 TPI (threads per inch) and a 3/4 in. thread length.

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