The Simpson Strong-Tie Titen HD 1/2 in. x 8 in. Mechanically Galvanized Heavy-Duty Concrete and Masonry Screw Anchor is a carbon steel screw anchor built for heavy-duty anchoring in concrete and masonry. This is a concrete and masonry screw anchor designed for securing fixtures into concrete, brick, and cinder block. Model Number: THD50800HMG. In this size, you get a 1/2 inch diameter anchor, 8 inch overall length, mechanically galvanized finish, and a 20-piece pack.

What matters on the job is that this anchor is made to install with a standard 1/2 inch carbide drill bit, so the hole size matches the nominal anchor diameter. That keeps layout and prep straightforward. Simpson Strong-Tie also uses serrated teeth at the tip to help the anchor cut into the base material and reduce installation torque, which can make a real difference when you are driving a larger fastener through a fixture and into cured concrete.

The thread geometry is doing the heavy lifting here. Simpson calls out a thread design that undercuts to transfer load efficiently into the base material. In plain terms, that means this anchor is not just filling a hole, it is biting into the concrete in a way that supports demanding structural and heavy-duty attachment work. It is also qualified for static and seismic loading conditions, which tells you it is intended for serious anchoring applications rather than light-duty hanging jobs.

This mechanically galvanized version is the one to look at when the application calls for corrosion resistance beyond standard interior-only hardware. The coating meets ASTM B695, Class 65, Type 1. Simpson Strong-Tie positions it for exterior use and some interior pressure-treated wood sill plate applications. If you are fastening treated lumber, post bases, ledgers, seating, holdowns, bracing, or formwork to concrete, that finish and application rating matter.

From a design standpoint, the hex washer head is a practical feature. It does not require a separate washer unless code requires one, which means fewer loose pieces to keep track of and a cleaner install. The head is also stamped for easy identification. For crews managing multiple anchor sizes on site, that small detail helps prevent mix-ups. This anchor is fully removable too, which is useful in temporary installations or when a fixture needs to be repositioned later.

For this specific THD50800HMG size, the wrench size is 3/4 inch, the recommended fixture hole size is 5/8 inch to 11/16 inch, and the thread length is 5-1/2 inches with 3 threads per inch. That combination makes it a good fit when you need added length for thicker fixtures, deeper embedment needs, or assemblies like post bases and ledger attachments where a shorter anchor may not give you enough reach.

There are a couple of practical limitations worth knowing. Simpson states these anchors are for one-time use only, since repeated installation can wear the threads and reduce load capacity. They also caution against oversized holes in the base material because that reduces the thread-to-concrete interlock that gives the anchor its hold. If you are installing into hollow CMU, do not use an impact wrench.

Who should buy this? Contractors, remodelers, concrete crews, deck builders, and serious DIYers working on real anchoring jobs. If you need a heavy-duty screw anchor that installs with standard tooling, handles concrete and masonry, and offers the convenience of removability, this is a strong choice. If your job is light-duty or purely decorative, it is more anchor than you need. But for structural-style fastening and tough base materials, this one earns its space in the truck.

Simpson Strong-Tie Titen HD 1/2 in. x 8 in. Mechanically Galvanized Heavy-Duty Concrete and Masonry Screw Anchor for Real Anchoring Work

This is the kind of anchor you buy when you need serious bite in concrete without stepping into a slower, fussier anchoring setup.

• Who it's for: Contractors and experienced DIYers anchoring post bases, ledgers, sill plates, and other heavy fixtures into concrete or masonry.
• Why it stands out: Standard-size drilling, lower install torque, removable design, and a mechanically galvanized finish that makes more sense for exterior-related work than plain steel.
• Worth knowing: It is a one-time-use anchor. That is not a dealbreaker, just the rule. Install it right the first time and treat it like a structural fastener, not a reusable screw.

• What base materials is this anchor designed for? It is intended for concrete and masonry, including concrete, brick, and cinder block.
• What size drill bit do I need? Use a 1/2 inch carbide drill bit, which matches the nominal anchor diameter.
• Can this anchor be removed? Yes. Simpson states the anchor is fully and easily removable, which is useful for temporary applications or fixture relocation.
• Can I reuse it after removal? No. Simpson states the Titen HD screw anchor is for one-time use only because reinstalling can wear the threads and reduce load capacity.
• What wrench size fits this model? This THD50800HMG anchor uses a 3/4 inch wrench size.