The Simpson Titen HD 1/4 in. x 3-1/2 in. Heavy-Duty Screw Anchor is a high-strength concrete and masonry screw anchor engineered by Simpson for reliable structural fastening in both cracked and uncracked concrete. Its self-undercutting, non-expansion design delivers outstanding performance under static and seismic loading conditions, making it a dependable solution for structural applications even at reduced edge distances and spacings. Recommended for permanent dry, interior non-corrosive environments or temporary outdoor applications, this zinc-plated carbon steel anchor combines installation simplicity with the load-transfer efficiency demanded by serious fastening work.

Key Features

• Qualified for static and seismic loading conditions - gives contractors and engineers confidence that the anchor meets the performance demands of code-sensitive structural applications.
• Self-undercutting thread design - efficiently transfers load to the base material without expansion pressure, making it suitable for installations at reduced edge distances and spacings where conventional expansion anchors may not qualify.
• No special drill bit required - installs using standard-sized ANSI tolerance drill bits, so there is no need to source proprietary tooling, keeping setup fast and straightforward.
• Hex-washer head with no separate washer needed - simplifies installation and leaves a clean, finished appearance once the anchor is set.
• Specialized heat-treating process on the carbon steel body - creates tip hardness for better cutting action without compromising overall ductility, balancing cutting performance with structural toughness.
• Zinc-plated finish - provides a corrosion-resistant coating suitable for temporary exterior use, extending the range of jobsite environments where this anchor can be deployed.
• Single-use design - the anchor is intended for one installation only; reinstalling it can cause excessive thread wear and reduce load capacity, so each anchor delivers its rated performance when used as directed.

Why This Product

• Dual-environment concrete anchoring - unlike screw anchors limited to uncracked concrete only, the Titen HD is specifically tested and qualified for both cracked and uncracked concrete under static and seismic conditions, broadening the range of structural applications it can cover.
• Structural-grade performance without complicated installation - the self-undercutting mechanics and standard ANSI drill bit compatibility mean a high-strength, seismic-rated concrete fastener can be installed with common tools and without specialized training.
• Designed for tight-clearance structural work - the non-expansion design allows use at reduced edge distances and spacings, giving engineers more flexibility in connection layouts where cracked or closely spaced concrete would otherwise create limitations.
• Heat-treated carbon steel construction - the specialized hardening process at the tip ensures clean, efficient cutting into concrete and masonry while preserving the ductility needed for dependable load transfer in demanding structural connections.

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: THDB25312H
• Diameter: 1/4 in.
• Length: 3-1/2 in.
• Material: Carbon Steel
• Coating / Finish: Zinc Plated
• Head Type: Hex-Washer Head
• Drive Type: 3/8 in. Hex
• Recommended Fixture Hole Size: 3/8 in. to 7/16 in.
• Packaging: Packs of 50 and Cartons of 250

Approved Applications

• Structural fastening in cracked and uncracked concrete
• Masonry anchoring applications
• Applications subject to static loading conditions
• Applications subject to seismic loading conditions
• Installations at reduced edge distances and spacings
• Permanent dry, interior non-corrosive environments
• Temporary outdoor applications

Frequently Asked Questions

Can the Titen HD anchor be used in cracked concrete?

Yes. The Titen HD anchor is specifically designed for optimum performance in both cracked and uncracked concrete, and has been tested under both static and seismic loading conditions in those environments.

Do I need a special drill bit to install this anchor?

No special drill bit is required. The Titen HD anchor is designed to install using standard-sized ANSI tolerance drill bits, simplifying the installation process.

Can this anchor be used outdoors?

The zinc-plated carbon steel construction makes this anchor suitable for temporary exterior applications. For permanent installations, it is recommended for dry, interior non-corrosive environments only.

Can I reuse the Titen HD screw anchor after installation?

No. The Titen HD screw anchor should be used one time only. Installing the anchor multiple times may result in excessive thread wear and reduce load capacity.

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