The Simpson Strong-Bolt 2 3/4 in. x 8 1/2 in. Mechanically Galvanized Wedge Anchor is a heavy-duty wedge-type expansion anchor engineered for high-load-resisting performance in exterior and exposed environments. Built from mechanically galvanized carbon steel, this anchor delivers enhanced corrosion resistance compared to standard zinc-electroplated versions, making it a reliable choice for demanding concrete and masonry anchoring applications. Dual undercutting embossments on each clip segment provide consistent holding power, and the anchor is tested in uncracked concrete per AC193 and in uncracked masonry per AC01, giving contractors and engineers confidence in verified, code-backed performance.

Key Features

• Chamfered top designed to prevent mushrooming during installation - protects the anchor head during driving, resulting in cleaner installs and easier nut engagement on the job site.
• Suitable for horizontal, vertical, and overhead applications - provides installation flexibility so the same anchor handles a wide range of structural and fixture-mounting orientations without substitution.
• Standard (ANSI) fractional sizes - fits standard fixtures and installs with common drill bit and tool sizes, reducing the need for specialized equipment on site.
• Tested per ACI355.2 and AC193 for uncracked concrete, and per AC01 for uncracked masonry - gives engineers and inspectors the documentation needed to specify and approve this anchor with confidence.
• Mechanically galvanized carbon steel construction - provides a corrosion-resistant finish suited for exterior applications where long-term durability in exposed conditions is required.
• Installs with a 3/4 in. drill bit and 1-1/8 in. wrench - matches standard tooling so crews can work efficiently without sourcing specialty equipment.

Why This Product

• Exterior-ready corrosion resistance - the mechanically galvanized finish is specifically suited for outdoor and exposed applications, offering greater protection than standard zinc-electroplated wedge anchors in environments where moisture and the elements are a factor.
• Verified high-load performance across multiple substrates - testing in both uncracked concrete (AC193) and uncracked masonry (AC01) means this anchor meets documented load standards in the base materials most commonly encountered in structural anchoring work.
• Versatile orientation capability - approved for horizontal, vertical, and overhead use, this wedge anchor reduces the need to stock multiple anchor types for different installation scenarios on the same project.
• Simpson Strong-Tie engineering with familiar sizing - ANSI fractional dimensions and a straightforward install process with common tooling make this anchor a practical choice for professionals who need dependable, repeatable results across concrete and masonry anchoring tasks.

Specifications

• Size: 3/4 in. x 8-1/2 in.
• MPN: STB2-75812MGF8
• Brand: Simpson Strong-Tie
• Diameter: 3/4 in.
• Length: 8-1/2 in.
• Thread Length: 6 in.
• Material: Carbon Steel
• Coating / Finish: Mechanically Galvanized
• Anchor Body: Mechanically Galvanized
• Nut: Carbon Steel ASTM A 563, Grade A
• Washer: Carbon Steel ASTM F844
• Clip: Carbon Steel ASTM A 568
• Installation Drill Bit: 3/4 in.
• Wrench Size: 1-1/8 in.
• Packaging: Packs of 8 and Cartons of 24

Approved Applications

• Horizontal installations
• Vertical installations
• Overhead installations
• High-load-resisting exterior applications
• Uncracked concrete (tested per AC193)
• Uncracked masonry (tested per AC01)

Frequently Asked Questions

What size drill bit is required to install the STB2-75812MGF8?

This anchor installs with a 3/4 in. drill bit and requires a 1-1/8 in. wrench size for tightening.

Is this wedge anchor suitable for outdoor or exterior use?

Yes. The mechanically galvanized carbon steel finish is specifically suited for exterior applications where enhanced corrosion resistance is required compared to standard zinc-electroplated anchors.

What standards has the Strong-Bolt 2 been tested to?

The STB2-75812MGF8 has been tested per ACI355.2 and AC193 for uncracked concrete, and also in uncracked masonry in accordance with AC01.

Can this anchor be used in overhead and horizontal orientations, or only vertically?

This anchor is suitable for horizontal, vertical, and overhead applications, providing installation flexibility across a wide range of structural anchoring scenarios.

Note: Product dimensions and/or thread length may differ from picture. Please refer to the specifications listed above for accurate product details.