The Simpson Titen HD 1/4 in. x 3-1/2 in. Countersunk Head Heavy-Duty Screw Anchor is a carbon steel concrete and masonry fastener built for demanding structural applications where both performance and installation simplicity matter. Engineered by Simpson for use in cracked and uncracked concrete as well as masonry substrates, this screw anchor delivers reliable load capacity under static, seismic, and wind-governed conditions. The countersunk head profile sets it apart from standard hex-head anchors by enabling a flush, clean surface finish - ideal for exposed through-set and flush-mount installations in dry, interior, noncorrosive environments or temporary outdoor settings.

Key Features

• Qualified for static and seismic loading conditions - meets the structural demands of seismic and wind-governed applications, giving contractors and engineers confidence in high-stakes installations.
• Hole size matches anchor size (1/4 in. drill bit diameter) - standard fractional sizing means no guesswork on bit selection, simplifying layout and reducing the chance of error on the job.
• Compatible with standard ANSI tolerance drill bits - no specialty tooling required, so you can start installing immediately without sourcing proprietary equipment.
• Removable design - ideal for temporary anchoring or any application where fixtures may need to be repositioned or removed at a later date.
• T30 6-lobe drive - reduces driver-bit cam-outs compared to traditional recessed anchor heads, resulting in faster, less frustrating installation with fewer stripped drives.
• Countersunk head style - allows for flush-mount profiles that a hex head cannot achieve, leaving a clean surface appearance for exposed through-set applications.
• Serrated teeth on the anchor tip - facilitate cutting into the base material and reduce the torque needed during installation, easing the driving process in dense concrete or masonry.
• Zinc-plated finish - provides a base level of corrosion resistance appropriate for dry, interior, noncorrosive environments or temporary outdoor use; not intended for permanent exterior or highly corrosive conditions.
• Driver bit included in each box - the correct T30 bit ships with the anchors so you have everything needed to get started without a separate trip to the tool supply.

Why This Product

• Seismic and wind-load qualification in a compact 1/4 in. diameter anchor - this screw anchor is engineered to handle the structural loading requirements that matter most in earthquake-prone and high-wind regions, making it a dependable choice for code-sensitive concrete fastening projects.
• Flush-mount capability opens up applications hex-head anchors cannot serve - the countersunk head sits below or flush with the fixture surface, keeping installations clean and unobtrusive wherever a protruding head would be a functional or aesthetic problem.
• Simplified installation from start to finish - the same 1/4 in. bit used to drill the hole drives the anchor, the serrated tip reduces installation torque, and the included T30 driver bit means no additional accessories are needed before work can begin.
• Removable construction supports flexible project planning - unlike adhesive or expansion anchors that are difficult or impossible to extract without damaging the base material, the Titen HD screw anchor can be removed and reinstalled, making it well suited for temporary structures, staging, or fixtures subject to future relocation.

Specifications

• Model No.: THDB25312CS
• Anchor Size: 1/4 in. x 3-1/2 in.
• Diameter: 1/4 in.
• Head Type: Countersunk Head
• Head Diameter: 1/4 in.
• Drive Type: T30 6-Lobe
• Material: Carbon Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Drill Bit Diameter: 1/4 in.
• Recommended Fixture Hole Size: 3/8 in. to 7/16 in.

Approved Applications

• Fastening into cracked and uncracked concrete
• Fastening into masonry substrates
• Dry, interior, noncorrosive environments
• Temporary outdoor applications
• Seismic and wind-governed structural conditions
• Flush-mount and exposed through-set installations requiring a clean surface appearance

What's Included

Each pack contains (50) Countersunk Titen HD Anchors, Driver bit included in each box.

Frequently Asked Questions

What base materials is the Titen HD screw anchor compatible with?

The Titen HD screw anchor is designed for use in cracked and uncracked concrete as well as masonry substrates, delivering high-strength performance in both application types.

Why choose the countersunk head style over a hex head?

The countersunk head style is specifically designed for applications that require a flush-mount profile. Countersinking also leaves a cleaner surface appearance for exposed through-set applications - something a hex head cannot provide.

Is this anchor suitable for outdoor or corrosive environments?

The Titen HD (carbon steel) with zinc plating is designed for use in dry, interior, noncorrosive environments or temporary outdoor applications. It is not recommended for permanent exterior use or highly corrosive environments. For long-lasting corrosion resistance, the Titen HD Type 316 stainless-steel option is available.

Does the Titen HD require a special drill bit for installation?

No special drill bit is required. The Titen HD is designed to install using standard-sized ANSI tolerance drill bits, with the hole size matching the anchor size at 1/4 in. A T30 driver bit is also included in each box for added convenience.

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