The Simpson Titen HD 1/4 in. x 1-7/8 in. Heavy-Duty Screw Anchor is a high-strength screw anchor built for demanding concrete and masonry fastening applications. Its self-undercutting, non-expansion design delivers outstanding performance in both cracked and uncracked concrete under static and seismic loading conditions, making it a dependable choice for structural installations where reliability cannot be compromised. Zinc-plated carbon steel construction and a specialized heat-treating process give this heavy-duty anchor the tip hardness and ductility needed for consistent, high-performance results across a wide range of structural fastening scenarios.

Key Features

• Qualified for static and seismic loading conditions - provides verified performance in both everyday structural applications and seismic-zone installations, giving contractors confidence in code-sensitive projects.
• Self-undercutting thread design - efficiently transfers load directly to the base material, allowing use at reduced edge distances and spacings without sacrificing holding strength.
• No special drill bit required - installs using standard-sized ANSI tolerance drill bits, reducing tool costs and simplifying jobsite preparation.
• Hex-washer head design - eliminates the need for a separate washer, streamlining installation and delivering a clean, professional finished appearance.
• Specialized heat-treating process - creates tip hardness for cleaner cutting while preserving ductility, so the anchor drives reliably without becoming brittle under load.
• Zinc-plated carbon steel construction - suitable for permanent dry interior environments and temporary outdoor applications, offering flexibility across a range of project conditions.
• Single-use design - each anchor is engineered for one installation only; reuse risks excessive thread wear and reduced load capacity, so replacement with a fresh anchor protects structural integrity.

Why This Product

• Engineered for cracked and uncracked concrete - most screw anchors are limited to uncracked substrates, but the Titen HD is specifically tested and qualified for both conditions, making it a versatile solution across a broader range of concrete fastening applications.
• Structural-grade performance with straightforward installation - the combination of self-undercutting thread geometry and compatibility with standard ANSI drill bits means there is no need for specialized tooling or complex procedures to achieve high-load results.
• Seismic qualification adds project eligibility - tested under seismic loading conditions, this anchor meets requirements for projects in seismic design categories where many standard anchors fall short.
• Reliable tip hardness without brittleness - Simpson's heat-treating process balances hardness at the tip with ductility through the body, reducing the risk of anchor failure during installation and under sustained structural loads.

Specifications

• Manufacturer Part Number (MPN): THDB25178H
• Brand: Simpson Strong-Tie
• Material: Carbon Steel
• Coating / Finish: Zinc Plated
• Diameter: 1/4 in.
• Length: 1-7/8 in.
• Recommended Fixture Hole Size: 3/8 to 7/16 in.
• Packaging: Packs of 100 and Cartons of 500

Approved Applications

• Cracked and uncracked concrete fastening
• Uncracked masonry fastening
• Structural applications at reduced edge distances and spacings
• Permanent dry, interior non-corrosive environments
• Temporary outdoor applications
• Static and seismic loading conditions

Frequently Asked Questions

Can the Titen HD be used in cracked concrete?

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

Do I need a special drill bit to install the Titen HD anchor?

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

Can the Titen HD screw anchor be removed and reinstalled?

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.

Is the Titen HD suitable for outdoor use?

The zinc-plated carbon steel Titen HD anchor is recommended for permanent dry, interior non-corrosive environments. It may also be used for temporary outdoor applications, but is not intended for permanent exterior or corrosive environments.

Note: Product dimensions and/or thread length may differ from picture. Please refer to the specifications listed above for accurate product details.