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

Key Features

• Qualified for static and seismic loading conditions - gives contractors and engineers confidence that this anchor meets the performance demands of code-critical structural applications.
• Self-undercutting thread design efficiently transfers load to the base material - maximizes holding strength in concrete and masonry without requiring an expansion mechanism, reducing stress on the surrounding substrate.
• No special drill bit required - installs with standard-sized ANSI tolerance drill bits, so there is no need to purchase additional tooling or change your existing setup.
• Hex-washer head requires no separate washer - simplifies installation and produces a clean, professional finished appearance without additional hardware.
• Specialized heat-treating process creates tip hardness without sacrificing ductility - the carbon steel construction cuts cleanly through concrete while maintaining the structural integrity needed for heavy-duty anchoring.
• Zinc-plated finish supports temporary exterior use - provides a practical corrosion-resistance option for job sites or applications that require outdoor exposure on a short-term basis.
• Single-use design protects load capacity - reinstalling the anchor multiple times can cause excessive thread wear, so the one-time-use requirement is a built-in safeguard for maintaining rated performance.

Why This Product

• Engineered for the most demanding concrete anchoring environments - tested and proven in both cracked and uncracked concrete under seismic and static loads, this heavy-duty screw anchor is suited for structural connections where performance cannot be compromised.
• Reduces installation complexity without reducing strength - because standard ANSI tolerance drill bits are all that is needed and no expansion hardware is involved, the Titen HD simplifies the anchoring process while still meeting rigorous structural requirements.
• Versatile across a wide range of approved applications - from masonry installations and interior structural connections to temporary outdoor fastening, a single anchor product covers multiple project scenarios, reducing the need to source different anchor types.
• Structural-grade performance at reduced edge distances and spacings - the non-expansion, self-undercutting design makes this concrete screw anchor a reliable option in tight or constrained layout conditions where other anchors may fall short of code requirements.

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: THD50400H
• Diameter: 1/2 in.
• Length: 4 in.
• TPI: 3
• Head Type: Hex-Washer Head
• Drive Type: 3/4 in. Hex
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Recommended Fixture Hole Size: 5/8 in. to 11/16 in.
• Drill Bit Size: 1/2 in. (standard ANSI tolerance)
• Packaging: Packs of 20 and Cartons of 80

Approved Applications

• Cracked and uncracked concrete structural applications
• Masonry installations requiring high-strength anchoring
• Static and seismic load conditions
• Structural applications 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. It has been tested and shown to provide outstanding performance under both static and seismic loading conditions in cracked and uncracked concrete.

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

No special drill bit is required. The Titen HD anchor is designed to install using standard-sized ANSI tolerance drill bits. For this 1/2 in. diameter anchor, use a 1/2 in. standard drill bit and ensure the fixture hole size is between 5/8 in. and 11/16 in.

Can this anchor be reused or reinstalled after removal?

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 this anchor suitable for outdoor or exterior use?

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

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