The Simpson Strong-Tie HDIASTH31 5/16 in. Setting Tool for Hollow Drop-In Anchors is a purpose-built installation tool engineered specifically to set the Hollow Drop-In Internally Threaded Anchor in hollow base materials such as CMU block and hollow-core plank. Designed as a matched companion to the HDIA31 anchor, this setting tool brings precision and consistency to overhead suspension work, making it a reliable choice for mechanical, electrical, and fire protection installers who need repeatable results in hollow masonry substrates.

Key Features

• Dedicated compatibility with the HDIA31 anchor - matched specifically to the 5/16 in. Hollow Drop-In Anchor, eliminating guesswork and ensuring a correct fit every time the tool is used.
• Threaded setting design - allows the hollow drop-in anchor to be driven and set with controlled engagement, reducing the risk of improper installation in hollow materials.
• Engineered for hollow base materials - purpose-designed for use in CMU block and hollow-core plank, so installers working in masonry construction have a tool that suits the substrate rather than a generic workaround.
• Supports a broad range of suspension applications - suitable for conduit systems, cable tray supports, pipe hangers, fire sprinkler installations, and suspended lighting, making it a versatile addition to a professional's toolkit.

Why This Product

• Exact-match tooling for the HDIA31 - because this setting tool is engineered specifically for the Simpson Strong-Tie HDIA31 anchor, installers get a precision-fit tool rather than an improvised substitute, which directly supports consistent anchor performance.
• Built for the challenges of hollow substrates - hollow materials like CMU and hollow-core plank demand a setting tool that accounts for their unique characteristics; this tool is designed from the ground up for exactly those conditions.
• Streamlines overhead suspension work - from fire sprinkler lines to cable trays and pipe supports, having the right dedicated setting tool means faster, more confident installs across multiple trade applications.
• Backed by Simpson Strong-Tie engineering - sourced from a brand with a longstanding focus on structural connection and anchoring solutions, giving contractors confidence that the tool is designed to work as part of a complete, validated anchoring system.

Specifications

• Model Number: HDIASTH31
• Brand: Simpson Strong-Tie
• Size: 5/16 in.
• Compatible Anchor: Hollow Drop-In Anchor model HDIA31
• Packaging: Packs of 1 and Cartons of 25

Approved Applications

• Setting hollow drop-in anchors in CMU (concrete masonry unit) block
• Setting hollow drop-in anchors in hollow-core plank
• Suspension of conduit systems
• Installation of cable tray supports
• Pipe support hanging applications
• Fire sprinkler system installations
• Suspended lighting fixture mounting

Frequently Asked Questions

What anchor model is the HDIASTH31 setting tool designed to work with?

The HDIASTH31 is specifically designed for use with the Simpson Strong-Tie Hollow Drop-In Anchor model HDIA31. It is a dedicated setting tool matched to that anchor's 5/16 in. size.

What base materials is this setting tool intended for?

This setting tool is designed to set hollow drop-in anchors in hollow materials, including CMU (concrete masonry units) and hollow-core plank substrates.

What types of installations is this tool suited for?

The HDIASTH31 supports installations that require suspending conduit, cable trays, pipe supports, fire sprinklers, and suspended lighting into concrete or hollow masonry materials.

What size is the HDIASTH31 setting tool?

The HDIASTH31 setting tool is sized at 5/16 in., corresponding directly to the HDIA31 Hollow Drop-In Anchor it is designed to set.

Note: Product dimensions and/or thread length may differ from picture. Please see the item description for specifications.