The Simpson Titen HD 3/8 in. x 4 in. Type 316 Stainless Steel Heavy-Duty Screw Anchor sets the standard for concrete and masonry anchoring where long-term corrosion resistance is non-negotiable. Engineered by Simpson for demanding conditions including salt water exposure, marine environments, and applications where chemical or corrosive solutions are present, this heavy-duty screw anchor combines the corrosion resistance of Type 316 stainless steel with an innovative carbon-steel cutting thread that undercuts the base material for efficient, reliable load transfer. The result is a fast-installing, single-use concrete anchor built to deliver lasting performance where lesser anchors would fail.

Key Features

• Qualified for static and seismic loading conditions - gives engineers and contractors confidence that this anchor meets the structural demands of both everyday and code-critical applications.
• Thread design undercuts to efficiently transfer the load to the base material - maximizes holding strength in concrete and masonry by locking mechanically into the substrate rather than relying on friction alone.
• No special drill bit required; designed to install using standard-sized ANSI tolerance drill bits - reduces tool requirements and simplifies job site setup, saving time and cost on every installation.
• Hex-washer head requires no separate washer - streamlines the installation process and provides a clean, professional finished appearance without additional hardware.
• Innovative carbon-steel cutting thread limits the amount of carbon steel in the anchor - less carbon steel means less expansion during installation, reducing stress on the surrounding base material while still cutting cleanly through concrete.
• Made from Type 316 stainless steel - provides superior corrosion resistance for the most extreme environments, including salt water, chemical exposure, and persistently wet or moist conditions.
• Single-installation design - the anchor is engineered for one-time use; reuse may result in excessive thread wear and reduced load capacity, so each installation delivers full, rated performance.
• Installs with an impact wrench or by hand tool using a 9/16 in. wrench - compatible with common power and hand tools, making installation straightforward for both field crews and contractors.

Why This Product

• Built for the harshest corrosive environments - Type 316 stainless steel is the optimal material choice when salt water, chemicals, or corrosive solutions are present, making this anchor a dependable long-term solution where Type 304 or carbon-steel anchors would deteriorate over time.
• Seismic and static load qualification reduces project risk - specifying an anchor qualified for both loading conditions means fewer compliance hurdles and greater confidence when anchoring in regions with seismic design requirements.
• No specialty tooling or extra hardware needed - standard ANSI tolerance drill bits and a common 9/16 in. wrench are all that is required, keeping installation straightforward and reducing the chance of job site delays.
• Undercutting thread technology delivers high-performance load transfer - rather than relying solely on expansion, the cutting thread mechanically engages the base material, providing efficient load distribution in concrete and masonry with less stress on the surrounding structure.

Specifications

• Model Number: THD37400H6SS
• Material: Type 316 Stainless Steel
• Finish: Type 316 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

Approved Applications

• Concrete and masonry anchoring in corrosive or extreme environments
• Salt water and marine environments where superior corrosion resistance is required
• Applications where chemical or corrosive solutions are present
• Static and seismic loading conditions

Frequently Asked Questions

What makes Type 316 stainless steel the right choice for this anchor?

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. It provides superior corrosion resistance compared to Type 304, making it ideal for the most demanding installation conditions.

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

No special drill bit is required. The Titen HD screw anchor is designed to install using standard-sized ANSI tolerance drill bits, simplifying setup and reducing tool requirements on the job site.

Can the Titen HD screw anchor be removed and reinstalled?

No. Use a Titen HD screw anchor one time only - installing the anchor multiple times may result in excessive thread wear and reduce load capacity. It is designed for single-installation use to ensure full performance and safety.

How is the Titen HD screw anchor installed, and what wrench size is needed?

The anchor installs with an impact wrench or by hand tool. A 9/16 in. wrench size is required, and the recommended fixture hole size is 1/2 to 9/16 in.

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