Simpson Strong-Tie Titen HD 3/8-in. x 4-in. Type 316 SS Countersunk Head Heavy-Duty Screw Anchor, 25-Pack (THD37400CS6SS)

Key Features

Built for Corrosion Type 316 stainless steel gives this anchor the corrosion resistance needed for tougher environments where standard plated anchors are not the right call. Flush-Mount Head The countersunk head sits flush with the fixture, which matters when a hex head would interfere with brackets, frames, or finished surfaces. Fast Concrete Anchoring This heavy-duty screw anchor installs with a standard-size drill bit and a T50 6-lobe drive, so setup is straightforward and driver-bit cam-out is reduced.

Overview

The Simpson Strong-Tie Titen HD 3/8-in. x 4-in. Type 316 SS Countersunk Head Heavy-Duty Screw Anchor, 25-Pack is a heavy-duty screw anchor for anchoring fixtures into concrete and masonry where you need a flush finish and strong hold. This is a heavy-duty screw anchor designed for flush-mount anchoring in concrete and masonry. Model Number THD37400CS6SS. If you are fastening brackets, frames, or other hardware that cannot have a hex head sticking proud of the surface, this anchor is built for that job.

At 3/8 in. diameter by 4 in. long, this anchor gives you a substantial mechanical connection for demanding installations. The hole size matches the anchor diameter, so you drill with a 3/8 in. carbide bit instead of chasing a special size. That saves time on layout and setup, especially when you are doing multiple anchors in a row. Simpson also rates this Titen HD family for static, wind, and seismic loading conditions, and the product is tested in accordance with ACI 355.2, AC193, and AC106.

The countersunk head is the big reason to choose this version over a standard hex-head anchor. It lets the fastener sit flush against the fixture, which is useful for door frames, brackets, plates, and exposed hardware where a raised head would get in the way or look sloppy. The T50 6-lobe drive also matters more than it sounds. It helps reduce driver-bit cam-out during installation, so you spend less time fighting the bit under load and less time cleaning up damaged recesses.

Material is where this specific model separates itself from basic anchors. THD37400CS6SS is made from Type 316 stainless steel, which is the right move when corrosion resistance is a real concern. If the jobsite, environment, or application calls for better long-term resistance than carbon steel or basic plating can offer, this version is the safer pick. It also uses serrated tip teeth to help cut into the base material and reduce installation torque, which makes driving smoother when conditions are right.

On the job, this anchor is practical. It is removable, so it works well for temporary anchoring or applications where fixtures may need to be moved later. Installation is simple: drill the hole to size, clean it as required, insert the anchor through the fixture, and tighten until the countersunk head contacts the fixture. For this 3/8 in. size, the recommended fixture hole size is 1/2 in. to 9/16 in., and minimum hole depth overdrill is 1/4 in. Each box includes the driver bit, so you are not hunting for the correct bit when the package shows up.

This anchor makes the most sense for contractors and serious DIY users working in construction, mechanical, electrical, plumbing, remodeling, and structural hardware installation. If your application needs a flush-mount profile, dependable concrete anchoring, and better corrosion resistance, this is a smart version of the Titen HD line to buy. If you only need a cheap interior anchor, there are lower-cost options. If you need stainless, removable performance, and a clean finished install, this is the one that earns its keep.

Flush Finish for Clean Hardware Installs

The countersunk head is the whole point here. It lets the anchor sit down into the fixture instead of standing proud, which keeps brackets and plates flat and avoids interference with whatever has to sit over the hardware.

• Countersunk head style for flush-mount applications
• Useful where a hex head would block fit-up or leave an exposed raised fastener

Drives Easier With Less Bit Slip

When you are driving anchors into concrete or masonry, bit engagement matters. The T50 6-lobe drive helps the driver stay planted, which makes installation more controlled and reduces the chance of chewing up the recess.

• T50 6-lobe drive for this 3/8 in. anchor size
• Serrated tip teeth help reduce installation torque

Simple Hole Prep, Strong Mechanical Hold

This anchor uses the same nominal drill bit size as the anchor diameter, which keeps prep straightforward. You are not dealing with oddball bits, and the removable design is handy when the fixture may need to come back out later.

• Uses a 3/8 in. drill bit for a 3/8 in. anchor
• Removable design is useful for temporary anchoring or repositioned fixtures

What’s in the Box

• (25) Simpson Strong-Tie Titen HD 3/8 in. x 4 in. Type 316 stainless steel countersunk head heavy-duty screw anchors
• (1) Driver bit

Key Specifications

Anchor Size	3/8 in. x 4 in.
Material	Type 316 Stainless Steel
Head Type	Countersunk Head
Drive Type	T50 6-Lobe
Drill Bit Diameter	3/8 in.
Minimum Hole Depth Overdrill	1/4 in.
Recommended Fixture Hole Size	1/2 in. to 9/16 in.
Packaging Quantity	25

Compatibility

Drill Bit Size Designed to install in a hole drilled with a 3/8 in. carbide drill bit, which matches the nominal anchor diameter. Drive Interface Uses a T50 6-lobe drive. A driver bit is included in the box. Fixture Fit For this 3/8 in. anchor size, recommended fixture hole size is 1/2 in. to 9/16 in. in structural steel thicker than 12 gauge.

Built For

Construction Mechanical / Electrical / Plumbing Door Frame Fastening Bracket Installation Flush-Mount Anchoring Temporary Anchoring Concrete and Masonry Fastening Corrosive Environments

Pro Tip

Match the hole in the base material to the 3/8 in. anchor diameter and keep the fixture hole in the recommended 1/2 in. to 9/16 in. range. Also, do not reuse this anchor after removal. Simpson calls these one-time-use anchors because repeated installation can wear the threads and cut load capacity.

Tool Nut’s Take

Tool Nut’s Take

Simpson Strong-Tie Titen HD 3/8-in. x 4-in. Type 316 SS Countersunk Head Heavy-Duty Screw Anchor, 25-Pack gets the details right

If you need a flush anchor that installs cleanly and holds up better in corrosive conditions, this is the version to buy.

• Who it’s for: Contractors, installers, and serious DIY users fastening brackets, frames, and hardware into concrete or masonry where a raised anchor head is a problem.
• Why it stands out: The countersunk head solves fit-up issues, the T50 6-lobe drive is easier to live with during installation, and the Type 316 stainless steel construction is the upgrade that actually matters on tougher jobs.
• Worth knowing: This is a one-time-use anchor, and proper hole sizing matters. If you are after the lowest price for dry interior work only, a carbon steel version may be enough. If you need stainless and flush, this one makes more sense.

Common Questions

• What drill bit size does this anchor require? This 3/8 in. anchor installs in a 3/8 in. hole drilled with a carbide drill bit.
• What driver size fits this anchor? The 3/8 in. Titen HD countersunk anchor uses a T50 6-lobe drive.
• Can this anchor be removed? Yes. It is removable, which makes it useful for temporary anchoring or applications where fixtures may need to be moved.
• Is this a good choice where corrosion resistance matters? Yes. This model is made from Type 316 stainless steel, which is intended for severe-level corrosion resistance.