The Simpson Titen HD 1/4 in. x 3-1/2 in. Mechanically Galvanized Heavy-Duty Screw Anchor is a high-strength fastening solution engineered for use in cracked and uncracked concrete, as well as uncracked masonry. Built by Simpson Strong-Tie - a trusted name in structural connectors and anchoring products - this screw anchor combines a proprietary heat treatment process with an ASTM B695 Class 65 mechanically galvanized coating, delivering reliable performance in both interior and exterior environments. Whether you are anchoring sill plates to a concrete foundation or securing ledgers and post bases in an outdoor structural application, this heavy-duty screw anchor is designed to handle demanding load conditions while remaining removable when the job calls for it.

Key Features

• ASTM B695 Class 65 mechanically galvanized coating - provides corrosion protection suitable for both interior and exterior applications, including environments where standard zinc plating would fall short
• Carbon steel construction with proprietary heat treatment - delivers the high-strength performance required for structural anchoring in concrete and masonry substrates
• Compatible with cracked and uncracked concrete, plus uncracked masonry - gives contractors and builders flexibility to use a single anchor type across multiple substrate conditions on a job site
• 1/4 in. diameter with a 3-1/2 in. overall length and 3 1/8 in. thread length - sized for applications requiring a compact yet structurally capable screw anchor without the need for adhesive or expansion components
• Installs with a 1/4 in. drill bit and a 3/8 in. wrench - uses standard tooling most contractors already carry, keeping installation fast and straightforward
• Recommended fixture hole size of 3/8 in. to 7/16 in. - accommodates common fixture clearances, simplifying layout and alignment during installation
• Removable design - supports temporary applications such as concrete formwork and bracing, or situations where a fixture must be relocated after initial installation

Why This Product

• Rated for use in cracked concrete - one of the more demanding anchoring conditions - this screw anchor is a reliable choice for seismic and structural applications where anchor performance under stress is critical
• The ASTM B695 Class 65 mechanically galvanized finish offers a step up in corrosion resistance compared to standard electroplated finishes, making it well suited for outdoor structural connections and exposure to moisture
• Its screw-in installation method eliminates the cure time associated with adhesive anchors and the unpredictability of expansion anchors in edge or close-spacing conditions - simply drill, clean, and drive
• The removable nature of the Titen HD screw anchor makes it equally practical for permanent structural uses like sill plates and holdown applications and for temporary uses like formwork bracing where the anchor must eventually be backed out

Specifications

• Brand: Simpson Strong-Tie
• Size: 1/4 in. x 3-1/2 in.
• Coating Material: Mechanically Galvanized
• Component Material: Carbon Steel
• Component Material, Clip: Carbon Steel ASTM A 568
• Mechanically Galvanized Coating Standard: ASTM B695 Class 65
• Drill Bit Diameter: 1/4 in.
• Wrench Size: 3/8 in.
• Thread Length: 3 1/8 in.
• Recommended Fixture Hole Size: 3/8 in. to 7/16 in.

Available Pack Options

• THDB25312HMG: 50 Pk
• THDB25312HMG -5P: 250 Pk

Approved Applications

• Sill plate anchoring to concrete foundations
• Ledger connections to concrete and masonry walls
• Post base installations on concrete slabs
• Seating and holdown anchoring applications
• Temporary bracing and concrete formwork where anchor removal is required
• Fixture relocation applications requiring a removable anchor

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