The Simpson Drop-In Internally Threaded Anchor DIAB50 is a displacement-controlled expansion anchor from Simpson engineered for fast, reliable installation into concrete base materials. Featuring improved geometry for smooth and accurate setting, this zinc-plated carbon steel anchor accepts 1/2-in. threaded rod and is designed to set with significantly less effort - making it a practical choice for overhead and horizontal concrete anchoring applications where speed and confirmed placement matter.

Key Features

• Sets with 40% fewer hammer hits than previous drop-in anchor designs - reduces installation time and physical effort on the job site
• Positive-set marking system with indication marker - gives installers a clear visual confirmation that the anchor is properly set before use, reducing the risk of under-set anchors
• Improved geometry for smooth and accurate installation - guides the anchor into the base material cleanly, helping achieve consistent results across multiple installations
• Internally threaded design for 1/2-in. rod - creates a secure, flush connection point for threaded rod without protruding hardware above the concrete surface
• Zinc-plated carbon steel construction - provides a corrosion-resistant finish suited for dry interior concrete anchoring applications
• Compatible with dedicated hand-setting and power-setting tools - works with the DIABST50 hand-setting tool or the DIABST50-SDS power-setting tool for flexible installation across different job site conditions

Why This Product

• Faster, less labor-intensive setting - the enhanced setting capability requires 40% fewer hammer hits than previous drop-in anchor designs, cutting installation time and reducing fatigue during high-volume concrete anchoring work
• Built-in confirmation of proper placement - the positive-set marking system takes the guesswork out of installation, giving crews confidence that every anchor is correctly set before loading
• Displacement-controlled expansion for predictable performance - the anchor expands in a controlled, repeatable way as it is set, supporting accurate and consistent results in concrete base materials
• Versatile tool compatibility - the option to install with either a hand-setting tool or a power-setting tool means this anchor adapts to the equipment already on the job site, whether you are doing small-scale work or production-volume installations

Specifications

• Brand: Simpson Strong-Tie
• Model Number (MPN): DIAB50
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Length: 2 in.
• Thread Length: 3/4 in.
• Threads Per Inch (TPI): 13
• Bolt/Rod Diameter: 1/2 in.
• Drill Bit Diameter: 5/8 in.
• Packaging: Packs of 50 and Cartons of 200

Frequently Asked Questions

What size threaded rod does the DIAB50 accept?

The DIAB50 is internally threaded to accept 1/2-in. diameter threaded rod with a thread pitch of 13 TPI (threads per inch).

What drill bit size is required to install the DIAB50?

A 5/8-in. diameter drill bit is required to drill the hole for proper installation of the DIAB50 drop-in anchor.

What tools are needed to set the DIAB50 anchor?

The DIAB50 installs with the DIABST hand-setting tool model DIABST50 or the power-setting tool model DIABST50-SDS. Both options drive the expansion plug toward the bottom of the anchor to properly set it.

How do I know when the DIAB50 anchor is properly set?

The DIAB50 features a positive-set marking system - an indication marker at the top of the anchor that clearly shows when the anchor has been properly set, confirming correct placement before use.

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