The Simpson Titen HD 1/2 in. x 4 in. Type 316 Stainless Steel Heavy-Duty Screw Anchor is engineered for concrete and masonry anchoring where corrosion resistance is non-negotiable. Built from Type 316 stainless steel and featuring an innovative carbon-steel cutting thread, this heavy-duty screw anchor delivers fast, efficient installation alongside long-lasting durability in the harshest conditions - from saltwater and marine environments to applications where chemical or corrosive solutions are present. The result is a state-of-the-art anchoring solution that combines the undercutting performance of heat-treated carbon-steel threads with the proven corrosion resistance of Type 300 Series stainless steel, giving contractors and builders unsurpassed peace-of-mind on every job.

Key Features

• Qualified for static and seismic loading conditions - meets code requirements for a wider range of structural and safety-critical applications, reducing the need to source a separate seismic-rated fastener.
• Undercutting thread design efficiently transfers load to the base material - maximizes holding strength in concrete and masonry so the anchor performs reliably under demanding loads.
• Innovative carbon-steel cutting thread with minimal carbon-steel content - the thread cuts cleanly through concrete while significantly limiting the amount of carbon steel in the anchor, meaning less expansion stress on the base material and reduced risk of cracking.
• No special drill bit required - the anchor is designed to install using standard-sized ANSI tolerance drill bits, keeping tool requirements simple and eliminating extra procurement costs.
• Hex-washer head requires no separate washer - the integrated head design speeds up installation and delivers a clean, professional finished appearance without additional hardware.
• Installs with an impact wrench or by hand tool - flexibility in installation method lets crews work efficiently with the tools already on site.
• Made from Type 316 stainless steel - the optimal grade for saltwater, marine, and chemically corrosive environments, providing superior corrosion resistance where lower grades would fail prematurely.
• Single-use design - installing the anchor one time only preserves full thread integrity and load capacity, ensuring the connection performs exactly as engineered.

Why This Product

• Built for extreme environments where standard anchors fall short - Type 316 stainless steel is the recognized choice for saltwater exposure and chemically aggressive conditions, making this screw anchor a dependable long-term solution in applications where corrosion would otherwise compromise structural integrity.
• Dual-material engineering delivers both cutting performance and corrosion resistance - the combination of heat-treated carbon-steel cutting threads with a Type 316 stainless steel body means the anchor cuts efficiently into concrete and masonry without sacrificing the corrosion protection the base material demands.
• Seismic and static qualification in a single anchor - rather than stocking separate fasteners for different loading scenarios, this anchor covers both static and seismic conditions, simplifying procurement and ensuring compliance on projects with strict structural requirements.
• Straightforward installation with no specialty tooling - compatibility with standard ANSI tolerance drill bits and a 3/4 in. hex drive means faster setup, fewer trips to the supply house, and a cleaner finished result with the integrated hex-washer head.

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: THD50400H6SS
• Diameter: 1/2 in.
• Length: 4 in.
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Head Type: Hex-Washer Head
• Drive Type: 3/4 in. Hex
• Recommended Fixture Hole Size: 5/8 in. to 11/16 in.
• Installation Tool: Impact wrench or hand tool; wrench size 3/4 in.
• Packaging: Packs of 20 and Cartons of 80

Approved Applications

• Concrete and masonry anchoring in corrosive or extreme environments
• Saltwater and marine environments where Type 316 stainless steel is required
• Applications where chemical or corrosive solutions are present
• Static and seismic loading conditions

Frequently Asked Questions

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.

Does installation require a special drill bit?

No special drill bit is required. The Titen HD screw anchor is designed to install using standard-sized ANSI tolerance drill bits.

Why is Type 316 stainless steel recommended for certain environments?

Type 316 is the optimal choice for applications in corrosive or extreme environments such as saltwater, or when chemical or corrosive solutions are present, offering superior corrosion resistance compared to other stainless steel grades.

Is this anchor rated for seismic applications?

Yes. The Titen HD screw anchor is qualified for both static and seismic loading conditions, making it suitable for use in seismic zones where code-compliant anchoring is required.

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