The Simpson Strong-Bolt 2 3/4 in. x 5-1/2 in. Mechanically Galvanized Wedge Anchor is a wedge-type expansion anchor built by Simpson for high-load-resisting connections in exterior and exposed environments. Constructed from mechanically galvanized carbon steel, this anchor delivers the corrosion resistance needed for outdoor concrete and masonry applications. Dual undercutting embossments on each clip segment provide reliable expansion performance, and the anchor is tested in uncracked concrete per AC193 and in uncracked masonry per AC01 - giving engineers and contractors a code-referenced option for demanding structural connections.

Key Features

• Mechanically galvanized carbon steel construction - provides enhanced corrosion resistance suited for exterior and exposed-environment anchoring where standard zinc-electroplated finishes may be insufficient.
• Dual undercutting embossments on each clip segment - the same proven design found on the zinc-electroplated Strong-Bolt 2, ensuring consistent and reliable wedge expansion during installation.
• Chamfered top design - prevents mushrooming of the anchor head during installation, protecting thread integrity and making nut seating cleaner and more secure.
• Suitable for horizontal, vertical, and overhead applications - gives installers flexibility to use a single anchor type across multiple orientations without switching products.
• Standard ANSI fractional sizing at 3/4 in. diameter - fits standard fixtures and works with common 3/4 in. drill bits and a 1-1/8 in. wrench, reducing the need for specialty tooling on the job site.
• Tested per ACI355.2 and AC193 - independent testing compliance gives project teams the documented performance data required for engineered or inspected installations.

Why This Product

• Exterior-rated corrosion protection without upsizing - the mechanically galvanized finish makes this anchor appropriate for exposed conditions where zinc-electroplated versions fall short, using the same familiar Strong-Bolt 2 body and installation process.
• Verified for both concrete and masonry substrates - AC193 and AC01 testing in uncracked concrete and uncracked masonry means one anchor covers a wider range of base materials on mixed or multi-phase projects.
• Versatile installation orientation - approved for horizontal, vertical, and overhead use, this anchor adapts to structural attachment points that other wedge anchors may not be rated to handle.
• Installs with common tools - the 3/4 in. drill bit requirement and 1-1/8 in. wrench size align with equipment already on most job sites, keeping setup time and tool costs low.

Specifications

• Model Number: STB2-75512MGF10
• Size: 3/4 in. x 5-1/2 in.
• Drill Bit Diameter: 3/4 in.
• Thread Length: 3-3/16 in.
• Anchor Body Material: Mechanically Galvanized Carbon Steel
• Nut Material: Carbon Steel ASTM A 563, Grade A
• Washer Material: Carbon Steel ASTM F844
• Clip Material: Carbon Steel ASTM A 568
• Anchor Type: Wedge-Type Expansion Anchor
• Finish/Coating: Mechanically Galvanized
• Testing Standard (Concrete): AC193 (Uncracked Concrete)
• Testing Standard (Masonry): AC01 (Uncracked Masonry)
• Packaging: Packs of 10 and Cartons of 40

Approved Applications

• Exterior and exposed-environment anchoring requiring corrosion resistance
• High-load-resisting connections in uncracked concrete
• High-load-resisting connections in uncracked masonry
• Horizontal installations
• Vertical installations
• Overhead installations

Frequently Asked Questions

What type of base material is the STB2-75512MGF10 tested and approved for?

The Strong-Bolt 2 wedge anchor in mechanically galvanized finish is tested in uncracked concrete in accordance with AC193 and in uncracked masonry in accordance with AC01, making it appropriate for both concrete and masonry substrates.

What drill bit size is required to install this anchor?

Installation requires a 3/4" diameter drill bit, matching the anchor's nominal diameter of 3/4".

Why choose the mechanically galvanized version over the zinc-electroplated version?

The mechanically galvanized finish is designed for exterior applications where greater corrosion resistance is needed compared to standard zinc-electroplated anchors. Both versions share the same dual undercutting embossments on each clip segment for consistent load performance.

Can this anchor be installed in overhead orientations?

Yes. The STB2-75512MGF10 Strong-Bolt 2 wedge anchor is suitable for horizontal, vertical, and overhead applications, providing installation flexibility across a wide range of structural fastening scenarios.

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