The Simpson Titen HD 3/8 in. x 4 in. Type 304 Stainless Steel Heavy-Duty Screw Anchor is a premium concrete and masonry anchoring solution engineered to deliver fast, efficient installation with long-lasting corrosion resistance across a wide range of environments. Built with the corrosion resistance of Type 304 stainless steel and an innovative carbon-steel thread that undercuts the base material as it drives, this heavy-duty screw anchor is the cost-effective choice for structural anchoring in wet, moist, or damp conditions where standard carbon-steel anchors would be vulnerable to deterioration.

Key Features

• Qualified for static and seismic loading conditions - provides verified performance confidence in both everyday structural loads and seismic events, making this anchor suitable for demanding code-compliant applications.
• Undercutting thread design - the thread efficiently transfers load to the base material as it cuts, creating a reliable mechanical interlock in concrete and masonry without requiring pre-expansion.
• No special drill bit required - designed to install using standard-sized ANSI tolerance drill bits, reducing tool costs and simplifying jobsite preparation.
• Hex-washer head with no separate washer needed - delivers a clean, finished appearance after installation while eliminating an extra component from the assembly process.
• Innovative carbon-steel cutting thread on a stainless-steel body - the limited carbon-steel thread effectively cuts the concrete while minimizing overall carbon-steel content in the anchor, meaning less expansion stress on the base material during installation.
• Type 304 stainless steel construction - offers dependable corrosion resistance for wet, moist, or damp environments at a more cost-effective price point than Type 316, making it the practical choice when extreme chemical or saltwater exposure is not a factor.
• Installs with an impact wrench or by hand tool using a 9/16 in. wrench - flexible installation options let crews choose the method that best fits the task, improving efficiency on varied jobsites.
• Single-use anchor design - installing the anchor only once preserves full thread integrity and maintains rated load capacity, ensuring the connection performs as engineered throughout the life of the installation.

Why This Product

• Corrosion resistance without over-engineering the spec - Type 304 stainless steel delivers proven protection against moisture, humidity, and damp conditions, so buyers get a durable, long-lasting anchor without paying for the heavier corrosion protection of Type 316 when the application does not require it.
• Seismic and static load qualification - the Titen HD is qualified for both static and seismic loading conditions, giving structural professionals and contractors a concrete and masonry anchor they can specify with confidence on projects where seismic performance must be demonstrated.
• Faster installation with standard tooling - because no special drill bit is required and the anchor drives with a common 9/16 in. wrench or impact wrench, installation is straightforward and does not demand additional equipment, keeping labor time and tooling costs in check.
• Engineered thread geometry that protects the base material - the undercutting carbon-steel thread cuts rather than expands, limiting stress on the surrounding concrete or masonry and making this screw anchor a reliable choice for anchoring into materials where crack-inducing expansion forces are a concern.

Specifications

• Model Number: THD37400H4SS
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Diameter: 3/8 in.
• Length: 4 in.
• Wrench Size: 9/16 in.
• Recommended Fixture Hole Size: 1/2 to 9/16 in.
• Installation Method: Installs with an impact wrench or by hand tool
• Packaging: Packs of 50 and Cartons of 200

Frequently Asked Questions

What base materials is the Titen HD screw anchor designed to be used with?

The Titen HD stainless-steel screw anchor is designed for use in concrete and masonry, making it suitable for a wide range of structural anchoring applications in those base materials.

Do I need a special drill bit to install the THD37400H4SS?

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

Why is Type 304 stainless steel used instead of Type 316 for this anchor?

Type 304 stainless steel is a cost-effective solution for less extreme applications where the environment may be wet, moist, or damp. Type 316 is the optimal choice for applications in corrosive or extreme environments such as salt water or when chemical or corrosive solutions are present.

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, which could compromise the structural integrity of the connection.

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