The Simpson Titen 1/4 in. x 3-3/4 in. Phillips Flat-Head Stainless Steel Concrete and Masonry Screw is a mechanical anchor from Simpson Strong-Tie, built for secure, reliable fastening of components to concrete, brick, grout-filled CMU, and hollow-block masonry in environments where a medium level of corrosion resistance is required. Constructed from Type 410 stainless steel with a zinc-plated protective overcoat, these concrete screws thread directly into a pre-drilled hole without a separate anchor, making them a straightforward solution for attaching electrical boxes, light fixtures, and structural components to masonry substrates. Specifiers and contractors trust Simpson Strong-Tie anchors for optimum performance across demanding applications, and the Titen screw line is engineered to deliver consistent holding strength with fast, clean installation.

Key Features

• Type 410 stainless steel construction with zinc-plated protective overcoat - provides a medium level of corrosion resistance plus an additional layer of surface protection, making these screws a dependable choice where standard carbon steel fasteners may be susceptible to corrosion.
• Phillips flat-head drive style - sits flush with the surface after installation for a clean, low-profile finish that works well in tight spaces and finished assemblies.
• Compatible with concrete, brick, grout-filled CMU, hollow-block masonry, and some preservative-treated wood - gives contractors and builders versatility across a wide range of common base materials without switching fastener systems.
• Direct-thread installation into a pre-drilled hole - eliminates the need for a separate anchor or insert, reducing installation steps and saving time on the job.
• Requires a 3/16 in. drill bit, included in each box - the appropriately sized bit ships with the screws so work can begin immediately without a separate trip for tooling.
• Engineered for demanding structural applications - designed and backed by Simpson Strong-Tie, a name specifiers and contractors rely on for mechanical anchors where performance under load is critical.

Why This Product

• Corrosion resistance built for challenging environments - Type 410 stainless steel plus a zinc-plated protective overcoat makes these masonry screws a smarter long-term choice than standard steel fasteners in areas exposed to moisture or corrosive conditions.
• Broad compatibility across masonry and concrete substrates - approved for concrete, brick, grout-filled CMU, hollow-block, and select preservative-treated wood applications, so one fastener handles a wide variety of field conditions without substitution.
• Ready-to-install convenience - each box includes a properly sized drill bit, meaning crews have everything needed to start fastening concrete screws and masonry anchors right out of the box with no additional sourcing required.
• Proven Simpson Strong-Tie engineering - the Titen screw line is purpose-designed for optimum performance in demanding structural applications, giving specifiers and contractors confidence in load-bearing and code-sensitive installations.

Specifications

• Model Number: TTN25334PFSS
• Diameter: 1/4 in.
• Length: 3-3/4 in.
• Material: Type 410 Stainless Steel
• Finish: Type 410 Stainless Steel with Zinc-Plated Protective Overcoat
• Head Style: Phillips Flat Head
• Drill Bit Diameter: 3/16 in.

Approved Applications

• Concrete substrates
• Brick
• Grout-filled CMU (concrete masonry unit)
• Hollow-block masonry
• Some preservative-treated wood applications
• Fastening electrical boxes, light fixtures, and similar components to concrete and masonry

What's Included

Each pack contains (100) Stainless Steel Concrete Screws, One drill bit is included in each box.

Frequently Asked Questions

What base materials are the Simpson TTN25334PFSS Titen screws compatible with?

These Titen screws are suitable for use in concrete, brick, grout-filled CMU, and hollow-block applications. They are also suitable for some preservative-treated wood applications.

What size drill bit is required to install these Titen concrete screws?

A 3/16 in. diameter drill bit is required for installation. For convenience, one appropriately sized drill bit is included in each box.

Why are these Titen screws made from Type 410 stainless steel?

Type 410 stainless steel provides a medium level of corrosion resistance, making these screws well-suited for environments where standard carbon steel anchors may be susceptible to corrosion. The zinc-plated protective overcoat adds an additional layer of surface protection.

What is the head style of the TTN25334PFSS, and why does it matter?

The TTN25334PFSS features a Phillips flat-head design, which sits flush with or below the surface of the material being fastened. This low-profile head style is ideal for applications where a smooth, unobtrusive finish is required, such as attaching electrical boxes or light fixtures to concrete and masonry surfaces.

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