The Simpson Strong-Bolt 2 Wedge Anchor in 3/4 in. x 4-3/4 in., crafted from Type 304 stainless steel, is a high-performance expansion anchor engineered for demanding structural applications where corrosion resistance and reliable load transfer are essential. Designed by Simpson Strong-Tie for use in cracked and uncracked concrete, this wedge-type expansion anchor is built to perform in seismic and high-wind conditions, making it a trusted choice for contractors and engineers working in corrosive or outdoor service environments.

Key Features

• Chamfered top design - prevents mushrooming during installation, ensuring a clean, flush seating of fixtures without damaging surrounding material
• Dual undercutting embossments on each clip segment - enables secondary expansion if a crack forms and intersects the anchor location, significantly increasing the anchor's ability to maintain load even as the hole expands
• Qualified for static and seismic loading conditions (seismic design categories A through F) - provides confidence that the anchor meets code requirements across the full range of seismic zones, from low-risk to the most demanding high-seismic regions
• Suitable for horizontal, vertical, and overhead applications - gives installers flexibility to use a single anchor type across a wide variety of orientations without needing different products for different positions
• Standard ANSI fractional sizing - fits standard fixtures and works with common drill bit and wrench sizes already in your toolkit, reducing the need for specialty tools
• Tested per ACI355.2 and AC193 - independently verified performance standards give engineers and inspectors documented confidence in load ratings and code compliance
• Type 304 stainless steel construction throughout - delivers long-lasting corrosion resistance across a wide variety of service environments, including wet, humid, and mildly corrosive outdoor conditions
• 3/4 in. diameter with 2-1/2 in. thread length - provides substantial threaded engagement for secure nut and washer seating on thick base plates and structural connections

Why This Product

• Built for seismic and high-wind jobsites - the dual undercutting embossment technology and code listing for seismic design categories A through F make this anchor a reliable solution when structural integrity under dynamic loads is non-negotiable
• Stainless steel for corrosive environments - Type 304 stainless steel resists rust and degradation in moisture-exposed, outdoor, and chemically active settings where standard carbon steel anchors would fail prematurely
• Versatile installation orientation - approved for horizontal, vertical, and overhead concrete anchorage, this anchor reduces the need to stock multiple anchor types for different structural attachment scenarios
• Drop-in compatibility with standard tooling - the 3/4 in. drill bit requirement and 1-1/8 in. wrench size align with common contractor tool inventories, streamlining installation without additional equipment investment

Specifications

• Brand: Simpson Strong-Tie
• Diameter: 3/4 in.
• Length: 4-3/4 in.
• Thread Length: 2-1/2 in.
• Drill Bit Diameter: 3/4 in.
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Testing Standards: ACI355.2 and AC193
• Country of Origin: China

Available Pack Options

• STB2-754344SS-R: 4 Pk
• STB2-754344SSR10: 10 Pk
• STB2-754344SSR10 -4: 40 Pk

Install With

• Installs with 3/4 in. drill bit and 1-1/8 in. wrench size

Frequently Asked Questions

Is the Strong-Bolt 2 wedge anchor approved for use in cracked concrete?

Yes. The Strong-Bolt 2 is code listed for both cracked and uncracked concrete applications. Its dual undercutting embossments on each clip segment allow secondary expansion if a crack forms and intersects the anchor location, helping the anchor maintain load capacity even when the hole expands.

What seismic design categories is this anchor qualified for?

The Strong-Bolt 2 is qualified for static and seismic loading conditions covering seismic design categories A through F - the full range recognized under U.S. building codes - making it suitable for projects in both low-seismic and the most demanding high-seismic regions.

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

The Strong-Bolt 2 is suitable for horizontal, vertical, and overhead applications, giving contractors the flexibility to use a single anchor solution across a variety of structural attachment orientations without needing a different product for each position.

What makes the Type 304 stainless steel version different from a standard zinc-plated wedge anchor?

Type 304 stainless steel provides long-lasting corrosion resistance suited to a wide variety of service environments - including wet, humid, and mildly corrosive outdoor settings - where a standard zinc-plated anchor would be more susceptible to rust and degradation over time. The stainless construction makes this anchor the preferred choice when service life and environmental exposure are key considerations.

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