The Simpson Strong-Bolt 2 5/8 in. x 7 in. Wedge Anchor in Type 304 Stainless Steel is a high-performance wedge-type expansion anchor engineered for demanding structural anchoring in concrete. Built to perform reliably in seismic and high-wind conditions, this anchor features dual undercutting embossments on each clip segment that enable secondary expansion should a crack form and intersect the anchor location - significantly increasing its ability to carry load even if the hole expands. Fully assembled and constructed from Type 304 Stainless Steel throughout, it delivers long-lasting corrosion resistance across a wide variety of service environments where standard carbon steel anchors would fall short.

Key Features

• Type 304 Stainless Steel construction - provides long-lasting corrosion resistance for use in demanding service environments, including wet, coastal, and chemically exposed conditions
• Code listed for cracked and uncracked concrete applications - gives engineers and contractors the confidence of verified performance across both concrete conditions without needing a separate anchor product
• Dual undercutting embossments on each clip segment - allow secondary expansion if a crack intersects the anchor location, maintaining load-carrying capacity even as the hole expands
• Qualified for static and seismic loading conditions (seismic design categories A through F) - makes this anchor suitable for the full range of seismic zones, including the most demanding high-wind and earthquake-prone regions
• Suitable for horizontal, vertical, and overhead applications - provides installation flexibility so a single anchor type can be used across multiple orientations on a job site
• Chamfered top design - prevents mushrooming during installation, protecting thread integrity and making nut engagement easier and more reliable
• Standard ANSI fractional sizing at 5/8 in. x 7 in. - fits standard fixtures and installs with common drill bit and tool sizes, reducing the need for specialty tooling
• Installs with a 5/8 in. drill bit and 15/16 in. wrench - simplifies tool planning and keeps installation straightforward with widely available equipment
• Tested per ACI355.2 and AC193 - ensures the anchor meets recognized industry testing standards, supporting code-compliant project documentation

Why This Product

• Built for the most challenging concrete anchoring conditions - the Strong-Bolt 2 is qualified for seismic design categories A through F and high-wind conditions, making it a dependable choice when structural performance requirements are at their highest
• Engineered to maintain load capacity even in cracked concrete - the dual undercutting embossments on each clip segment allow secondary expansion if a crack forms at the anchor location, a critical advantage for long-term structural reliability that most standard wedge anchors do not offer
• All-stainless construction protects the entire assembly - with Type 304 Stainless Steel used throughout the anchor body, nut, and washer, there is no weak link in corrosion resistance, making this anchor well suited for exterior, marine-adjacent, and corrosive environments
• Versatile installation without specialty tooling - compatibility with standard ANSI fractional drill bit sizes and common wrench sizes means this anchor integrates easily into existing workflows for horizontal, vertical, and overhead concrete anchoring tasks

Specifications

• Model No.: STB2-62700S4F20
• Coating/Material: Type 304 Stainless Steel
• Size: 5/8 in. x 7 in.
• Drill Bit Diameter: 5/8 in.
• Thread Length: 4-15/16 in.
• Anchor Body Material: Type 304 Stainless Steel
• Nut Material: Type 304 Stainless Steel
• Washer Material: Type 304 Stainless Steel
• Clip Material: Type 304 or Type 316 Stainless Steel
• Packaging: Packs of 20 and Cartons of 80

Approved Applications

• Cracked concrete applications
• Uncracked concrete applications
• Seismic conditions requiring high-performance anchoring
• High-wind conditions requiring reliable load-carrying capacity
• Service environments where long-lasting corrosion resistance is required

Frequently Asked Questions

What drill bit diameter is required to install the STB2-62700S4F20 wedge anchor?

A 5/8" diameter drill bit is required to properly install this Strong-Bolt 2 wedge anchor in concrete.

Is this anchor suitable 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 for secondary expansion if a crack forms and intersects the anchor location, significantly increasing its ability to carry load even if the hole expands.

Why is Type 304 Stainless Steel used throughout this anchor's components?

Type 304 Stainless Steel is used for the anchor body, nut, and washer to provide long-lasting corrosion resistance across a wide variety of service environments where standard zinc-plated or carbon steel anchors may be susceptible to degradation.

Can this anchor be used in seismic or high-wind applications?

Yes. The Strong-Bolt 2 wedge anchor is specifically designed as an optimal choice for high-performance applications, including those subject to seismic activity and high-wind conditions.

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