The Simpson Titen HD 3/4 in. x 4 in. Type 316 Stainless Steel Heavy-Duty Screw Anchor is engineered for concrete and masonry anchoring in corrosive and extreme environments where long-term performance cannot be compromised. Built from Type 316 stainless steel - the optimal material for salt water, marine, and chemical exposure applications - this heavy-duty screw anchor pairs superior corrosion resistance with an innovative heat-treated carbon-steel cutting thread design, delivering fast, reliable installation and the structural confidence to handle both static and seismic loading conditions.

Key Features

• Qualified for static and seismic loading conditions - meets the structural demands of both standard and high-seismic applications, giving engineers and installers confidence in safety-critical connections
• Undercutting thread design - transfers load efficiently into the base material, maximizing holding strength in concrete and masonry substrates
• No special drill bit required - compatible with standard-sized ANSI tolerance drill bits, keeping installation straightforward and your tool kit simple
• Hex-washer head design - eliminates the need for a separate washer while providing a clean, professional installed appearance
• Innovative carbon-steel cutting thread with minimal carbon-steel content - effectively cuts concrete during installation while limiting expansion forces, reducing the risk of edge or spacing issues
• Made from Type 316 stainless steel - provides superior corrosion resistance in salt water, marine, and chemically aggressive environments where lesser materials would fail prematurely
• Single-use design - each anchor is intended for one-time installation only; reinstalling may cause excessive thread wear and reduce load capacity, ensuring full performance is preserved on every job

Why This Product

• Built for the harshest environments - Type 316 stainless steel is the optimal choice when corrosive conditions such as salt water exposure or chemical solutions are present, making this anchor a reliable long-term solution where corrosion resistance is non-negotiable
• Seismic and static load qualification in one anchor - rather than sourcing separate hardware for different load scenarios, this screw anchor is pre-qualified for both conditions, simplifying specification and procurement for structural applications
• Faster installation without special tooling - the Titen HD installs using standard ANSI tolerance drill bits and a 1 1/8 in. wrench with an impact wrench or hand tool, reducing setup time and avoiding the cost of proprietary equipment
• A proven Simpson design with purposeful engineering - the combination of stainless-steel body construction with heat-treated carbon-steel cutting threads reflects a deliberate balance between corrosion resistance and the mechanical performance needed to anchor reliably into concrete and masonry

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: THD75400H6SS
• Diameter: 3/4 in.
• Length: 4 in.
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Head Type: Hex-Washer Head
• Drive Type: 1-1/8 in. Hex
• Installation Tool: Impact wrench or hand tool; wrench size 1-1/8 in.
• Recommended Fixture Hole Size: 7/8 in. to 15/16 in.
• Loading Conditions: Static and Seismic
• Packaging: Packs of 10 and Cartons of 40

Approved Applications

• Anchoring into concrete and masonry substrates
• Installations in salt water or marine environments
• Applications where chemical or corrosive solutions are present
• Corrosive or extreme environment structural connections
• Static and seismic load-rated structural anchoring

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. Its superior corrosion resistance outperforms other grades in these demanding conditions.

Do I need a special drill bit to install the Titen HD screw 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. Use a Titen HD screw anchor one time only - installing the anchor multiple times may result in excessive thread wear and reduce load capacity.

Is this anchor approved for seismic applications?

Yes. The Simpson Titen HD screw anchor is qualified for both static and seismic loading conditions, making it suitable for use in seismically active regions.

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