The Simpson Strong-Bolt 2 5/8 in. x 6 in. Wedge Anchor in Type 316 Stainless Steel is a wedge-type expansion anchor engineered for high-performance concrete fastening in the most demanding structural and environmental conditions. Built to excel in seismic and high-wind applications, this anchor features dual undercutting embossments on each clip segment that enable secondary expansion if a crack forms and intersects the anchor location - helping maintain load-carrying capacity even as the concrete hole expands. Every component, including the anchor body, nut, washer, and clip, is manufactured from Type 316 stainless steel, delivering long-lasting corrosion resistance across a wide variety of service environments where moisture, chemicals, or outdoor exposure are concerns. It installs with a standard 5/8 in. drill bit and a 15/16 in. wrench, making it compatible with common tools and fixtures.

Key Features

• Code listed for cracked and uncracked concrete applications - gives engineers and contractors confidence that the anchor meets recognized standards for both concrete conditions, reducing approval risk on the job site.
• Dual undercutting embossments on each clip segment - enable secondary expansion if cracking occurs at the anchor location, so the connection continues to carry load even if the hole expands over time.
• Qualified for static and seismic loading conditions (seismic design categories A through F) - suitable for the full range of seismic zones, making this anchor a dependable choice for structural connections in earthquake-prone regions and high-wind areas.
• Chamfered top designed to prevent mushrooming during installation - protects the anchor threads during driving, ensuring a clean, reliable installation every time.
• Suitable for horizontal, vertical, and overhead applications - provides installation flexibility so one anchor handles multiple orientations on a single project without the need for different fastener types.
• Standard ANSI fractional sizing at 5/8 in. x 6 in. - fits standard fixtures and works with commonly available drill bits and tools, keeping installation straightforward and cost-efficient.
• Tested per ACI355.2 and AC193 - independently verified performance data supports confident specification by engineers and inspectors on code-compliant projects.
• All components manufactured from Type 316 stainless steel - uniform material throughout the entire assembly ensures consistent corrosion resistance in moisture-rich, chemical-exposed, or outdoor service environments.

Why This Product

• Built for the toughest structural conditions - qualified for seismic design categories A through F and high-wind applications, this wedge anchor is an optimal choice when code-compliant performance in demanding environments is non-negotiable.
• Engineered to maintain load capacity in cracked concrete - the dual undercutting embossment design allows secondary expansion at the clip segments, a critical advantage in real-world conditions where concrete cracking can occur after installation.
• Comprehensive corrosion protection with no weak links - because every component, anchor body, nut, washer, and clip, is Type 316 stainless steel, there are no mixed-material vulnerabilities that could accelerate corrosion in harsh or corrosive service environments.
• Installs cleanly with standard tools - the chamfered top prevents thread damage during installation, and the standard ANSI 5/8 in. sizing means no specialty drill bits or wrenches are required, saving time and reducing setup costs on the job.

Specifications

• Model No.: STB2-62600S6F20
• Coating/Material: Type 316 Stainless Steel
• Size: 5/8 in. x 6 in.
• Drill Bit Diameter: 5/8 in.
• Thread Length: 3-15/16 in.
• Component Material, Anchor Body: Type 316 Stainless Steel
• Component Material, Nut: Type 316 Stainless Steel
• Component Material, Washer: Type 316 Stainless Steel
• Component Material, Clip: Type 316 Stainless Steel
• Packaging: Packs of 20 and Cartons of 80

Approved Applications

• Cracked concrete installations
• Uncracked concrete installations
• Seismic zone fastening applications
• High-wind condition structural connections
• Corrosive and moisture-exposed service environments

Frequently Asked Questions

Is the Strong-Bolt 2 STB2-62600S6F20 suitable for use in cracked concrete?

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

Why is Type 316 stainless steel used for all components?

Type 316 stainless steel offers long-lasting corrosion resistance suitable for a wide variety of service environments, including those with exposure to moisture, chemicals, or outdoor conditions. All four components - the anchor body, nut, washer, and clip - are made from Type 316 stainless steel to ensure uniform performance and durability throughout the entire assembly.

What drill bit diameter is required to install this anchor?

Installation requires a 5/8 in. drill bit to create the proper hole size for this 5/8" x 6" wedge anchor.

Is this anchor appropriate for seismic or high-wind applications?

Yes. The Strong-Bolt 2 wedge anchor is an optimal choice for high-performance fastening even in seismic and high-wind conditions, making it well suited for structural connections in demanding environments.

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