The Simpson Strong-Bolt 2 5/8 in. x 3-1/2 in. Mechanically Galvanized Wedge Anchor is a wedge-type expansion anchor engineered for high-load-resisting performance in exterior concrete and masonry applications. Built from mechanically galvanized carbon steel, it delivers the corrosion resistance needed for outdoor structural connections while maintaining the same dual undercutting embossments on each clip segment found in the zinc-electroplated version. Whether you are anchoring into horizontal, vertical, or overhead surfaces, this anchor is tested in uncracked concrete per AC193 and in uncracked masonry per AC01, giving contractors and builders a dependable fastening solution across a wide range of structural installations.

Key Features

• Chamfered top design - prevents mushrooming during installation, so the anchor seats cleanly and the nut drives on without damage or rework.
• Mechanically galvanized carbon steel construction - provides corrosion resistance suited for exterior applications, extending service life in exposed or demanding environments.
• Dual undercutting embossments on each clip segment - the same proven design as the zinc-electroplated version, delivering consistent and reliable load transfer into the base material.
• Suitable for horizontal, vertical, and overhead applications - gives installers the flexibility to use a single anchor type across multiple orientations on the same job site.
• Tested per ACI355.2 and AC193 in uncracked concrete, and per AC01 in uncracked masonry - independently verified performance so you can specify and install with confidence.
• Standard ANSI fractional sizing at 5/8 in. diameter - fits standard fixtures and installs with a common 5/8 in. drill bit and 15/16 in. wrench, minimizing the need for specialty tooling.

Why This Product

• Built for exterior structural anchoring - the mechanically galvanized finish is specifically intended for outdoor and corrosion-prone environments, making this anchor a practical choice where uncoated or zinc-electroplated fasteners fall short.
• Tested to recognized standards in both concrete and masonry - verification per AC193 and AC01 means load ratings are backed by independent testing, not just manufacturer claims, supporting use on code-required structural connections.
• Versatile orientation compatibility - approved for horizontal, vertical, and overhead installations, this wedge anchor reduces the need to source different products for different anchor angles on a single project.
• Installs with common tooling - the 5/8 in. drill bit and 15/16 in. wrench requirement means no specialty equipment is needed, keeping installation straightforward and labor efficient.

Specifications

• Model Number: STB2-62312MGF20
• Size: 5/8 in. x 3-1/2 in.
• Drill Bit Diameter: 5/8 in.
• Thread Length: 1-5/8 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
• Coating: Mechanically Galvanized
• Packaging: Packs of 20 and Cartons of 100

Approved Applications

• Exterior applications requiring high-load-resisting anchorage
• Horizontal installations
• Vertical installations
• Overhead installations
• Uncracked concrete (tested per AC193)
• Uncracked masonry (tested per AC01)

Frequently Asked Questions

What size drill bit is required for the Simpson Strong-Bolt 2 5/8" x 3-1/2" wedge anchor?

A 5/8 in. diameter drill bit is required to install this anchor properly.

Is this anchor suitable for outdoor or exterior use?

Yes. The mechanically galvanized finish is specifically intended for exterior applications where corrosion resistance is important.

What standards has this anchor been tested to?

The STB2-62312MGF20 anchor has been tested in uncracked concrete in accordance with AC193 and in uncracked masonry in accordance with AC01.

Can this anchor be installed in orientations other than vertical?

Yes. The Strong-Bolt 2 is suitable for horizontal, vertical, and overhead applications.

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