The Simpson Strong-Bolt 2 1/2 in. x 7 in. Mechanically Galvanized Wedge Anchor is a wedge-type expansion anchor built by Simpson for high-load concrete and masonry fastening in exterior and demanding environments. Constructed from mechanically galvanized carbon steel, this anchor delivers corrosion resistance where standard zinc-electroplated fasteners may fall short, while retaining the same dual undercutting embossments on each clip segment that define the Strong-Bolt 2 design. Tested in uncracked concrete per AC193 and in uncracked masonry per AC01, it is engineered to perform reliably across horizontal, vertical, and overhead installations.

Key Features

• Mechanically galvanized carbon steel construction - provides enhanced corrosion resistance beyond standard electroplated finishes, making this anchor a dependable choice for exterior concrete and masonry applications exposed to moisture and the elements.
• Dual undercutting embossments on each clip segment - the same proven clip geometry found on the zinc-electroplated Strong-Bolt 2, delivering high holding strength and consistent expansion performance in the base material.
• Chamfered top design - prevents mushrooming of the anchor head during installation, protecting threads and keeping the installation process smooth and accurate.
• Suitable for horizontal, vertical, and overhead applications - gives installers flexibility to use a single anchor type across multiple fastening orientations on the same job site without switching products.
• Tested per ACI355.2 and AC193 in uncracked concrete, and per AC01 in uncracked masonry - independent third-party testing provides verified load data and code compliance confidence for structural and commercial projects.
• Standard ANSI fractional sizing at 1/2 in. diameter - fits standard fixtures and installs with a common 1/2 in. drill bit and 3/4 in. wrench, reducing the need for specialty tooling and keeping installation straightforward.

Why This Product

• Built for exterior high-load anchoring - the mechanically galvanized finish is specifically intended for applications where corrosion resistance is required, making this wedge anchor well-matched for outdoor concrete fastening that a standard anchor might not hold up to over time.
• Verified performance in both concrete and masonry - with independent testing conducted in uncracked concrete per AC193 and in uncracked masonry per AC01, this anchor supports a wider range of base material conditions under one part number.
• No special tooling required - the 1/2 in. drill bit requirement and 3/4 in. wrench size align with common job site tools, so crews can install this anchor without sourcing additional equipment or accessories.
• Trusted Simpson engineering with a proven clip design - the dual undercutting embossments carried over from the standard Strong-Bolt 2 line mean buyers get a well-established, high-load expansion anchor design in a corrosion-resistant coating, not a compromised version of the product.

Specifications

• Model Number: STB2-50700MGF25
• Size: 1/2 in. x 7 in.
• Coating / Material: Mechanically Galvanized / Carbon Steel
• Drill Bit Diameter: 1/2 in.
• Thread Length: 5-5/16 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
• Packaging: Packs of 25 and Cartons of 100

Approved Applications

• Exterior concrete anchoring applications requiring corrosion-resistant hardware
• Horizontal anchor installations
• Vertical anchor installations
• Overhead anchor installations
• Uncracked concrete applications tested per AC193
• Uncracked masonry applications tested per AC01

Frequently Asked Questions

What size drill bit is required to install this anchor?

This anchor requires a 1/2 in. diameter drill bit to create the properly sized hole for installation.

Is this anchor appropriate for outdoor or exterior use?

Yes. The mechanically galvanized finish on the anchor body is specifically intended to provide corrosion resistance, making this anchor suitable for exterior applications.

What standards has the Strong-Bolt 2 mechanically galvanized anchor been tested under?

The STB2-50700MGF25 anchor has been tested in uncracked concrete in accordance with AC193 and in uncracked masonry in accordance with AC01.

Can this anchor be used in overhead installations?

Yes. This wedge anchor is suitable for horizontal, vertical, and overhead applications, providing versatile placement options for a wide range of structural anchoring needs.

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