The Simpson Strong-Bolt 2 5/8 in. x 5 in. Mechanically Galvanized Wedge Anchor is a wedge-type expansion anchor built for high-load resistance in exterior anchoring applications. Constructed from mechanically galvanized carbon steel, it delivers enhanced corrosion protection compared to standard zinc-electroplated versions, making it a dependable choice for structural fastening into uncracked concrete and uncracked masonry. The anchor features dual undercutting embossments on each clip segment and is tested in uncracked concrete in accordance with AC193 and in uncracked masonry in accordance with AC01, giving contractors confidence across a wide range of demanding installation scenarios.

Key Features

• Chamfered top design - prevents mushrooming during installation, protecting threads and keeping the anchor properly seated without damage to the fastener head.
• Dual undercutting embossments on each clip segment - creates secure mechanical engagement within the base material, supporting reliable high-load performance in concrete and masonry applications.
• Mechanically galvanized carbon steel construction - provides superior corrosion resistance over standard electroplated finishes, making this anchor well suited for exterior and moisture-exposed environments.
• Suitable for horizontal, vertical, and overhead installations - gives contractors flexibility to use a single anchor solution across multiple orientations without switching products.
• Standard ANSI fractional sizing at 5/8 in. diameter - installs with a common 5/8 in. drill bit and a 15/16 in. wrench, minimizing the need for specialized tooling on the job site.
• Tested per ACI355.2 and AC193 in uncracked concrete, and per AC01 in uncracked masonry - provides third-party verified load data so engineers and inspectors can specify and approve the anchor with confidence.

Why This Product

• Built specifically for exterior high-load anchoring - the mechanically galvanized finish addresses the corrosion demands of outdoor installations where a standard zinc-electroplated wedge anchor would not hold up as well over time.
• Tested in both uncracked concrete and uncracked masonry - dual-substrate testing means this single anchor covers a broader range of approved base materials, reducing the need to source separate products for different substrates.
• Installation-friendly design from a trusted brand - Simpson engineered the Strong-Bolt 2 with a chamfered top to simplify driving and reduce installation errors, and the ANSI fractional sizing means it works with standard drill bits and wrenches already on hand.
• Versatile orientation approval for real-world job site conditions - rated for horizontal, vertical, and overhead use, this anchor adapts to the varying installation angles commonly encountered in structural, mechanical, and utility anchoring work.

Specifications

• Model Number: STB2-62500MGF20
• Size: 5/8 in. x 5 in.
• Drill Bit Diameter: 5/8 in.
• Thread Length: 2-15/16 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
• Coating: Mechanically Galvanized
• Packaging: Packs of 20 and Cartons of 80

Approved Applications

• Exterior high-load anchoring applications requiring corrosion resistance
• Installations into uncracked concrete (tested per AC193)
• Installations into uncracked masonry (tested per AC01)
• Horizontal anchor installations
• Vertical anchor installations
• Overhead anchor installations

Frequently Asked Questions

What size drill bit is required to install this anchor?

A 5/8-inch diameter drill bit is required for installation, matching the anchor's nominal diameter for a proper fit in concrete or masonry.

Is this anchor suitable for outdoor or exterior use?

Yes. The mechanically galvanized finish is specifically intended for exterior applications where enhanced corrosion resistance is needed compared to standard zinc-electroplated versions.

In what orientations can the Strong-Bolt 2 be installed?

The STB2-62500MGF20 anchor is suitable for horizontal, vertical, and overhead installations, offering flexibility across a wide range of structural anchoring scenarios.

What standards has this anchor been tested to?

The Strong-Bolt 2 Mechanically Galvanized anchor has been tested in uncracked concrete in accordance with AC193 and in uncracked masonry in accordance with AC01.

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