The Simpson Strong-Tie DIAB Lipped Drop-In Internally Threaded Anchor (Model DIABL25) is a displacement-controlled expansion anchor engineered for fast, accurate, and economical installation into concrete and other base materials. Featuring improved geometry for smooth seating and a positive-set marking system that confirms proper placement, the DIABL25 sets with 40% fewer hammer hits than previous drop-in anchor designs - making it one of the most efficient internally threaded anchors available for 1/4-in. rod applications.

Key Features

• Faster installation than previous drop-in anchor design - sets with 40% fewer hammer hits
• Positive-set marking system indicates when anchor is properly set
• Lipped for flush installation
• Zinc-plated carbon steel construction for corrosion resistance
• Displacement-controlled expansion mechanism requires minimal effort for quick, reliable setting
• Compatible with both hand-setting and power-setting tools for installation flexibility
• Improved geometry in the preassembled expansion plug enhances setting capability

Specifications

• Manufacturer Part Number (MPN): DIABL25
• Brand: Simpson Strong-Tie
• Bolt/Rod Diameter: 1/4 in.
• Length: 1 in.
• Thread Length: 3/8 in.
• TPI (Threads Per Inch): 20
• Drill Bit Diameter: 3/8 in.
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Packaging: Packs of 100 and Cartons of 500
• Country of Origin: China

Frequently Asked Questions

What setting tools are required to install the DIABL25 anchor?

The DIABL25 installs with the DIABST hand-setting tool model DIABST25 or the power-setting tool model DIABST25-SDS. Using the appropriate setting tool drives the expansion plug toward the bottom of the anchor to achieve a proper, confirmed set.

How do I know when the DIABL25 anchor has been properly set?

The DIABL25 features a positive-set marking system - a visible indication marker located at the top of the anchor. Once the marker shows, you can confirm that the anchor has been properly and fully set in the base material.

What drill bit size is required for the DIABL25 drop-in anchor?

A 3/8 in. diameter drill bit is required to prepare the hole for the DIABL25 anchor. The anchor itself accepts a 1/4-in. threaded rod with 20 threads per inch (TPI).

What makes the DIABL25 faster to install than older drop-in anchor designs?

The DIABL25 features improved geometry in its preassembled expansion plug, which enhances the setting capability of the anchor. This redesign allows the anchor to be fully set with 40% fewer hammer hits compared to previous drop-in anchor versions, significantly reducing installation time and effort.

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