The Simpson Strong-Bolt 2 Wedge Anchor (5/8 in. x 10 in.) is a wedge-type expansion anchor built from zinc-plated carbon steel and engineered for high-performance structural connections in even the most demanding conditions, including seismic and high-wind environments. Dual undercutting embossments on each clip segment enable secondary expansion should a crack form and intersect the anchor location, significantly increasing the anchor's ability to carry load if the hole expands. Qualified for static and seismic loading across seismic design categories A through F and tested per ACI355.2 and AC193, this anchor is a dependable fastening solution for concrete and masonry applications across horizontal, vertical, and overhead orientations.

Key Features

• Chamfered top design - prevents mushrooming during installation, helping ensure a clean, controlled drive every time and reducing the risk of installation damage.
• Dual undercutting embossments on each clip segment - enable secondary expansion if a crack intersects the anchor location, maintaining load-carrying capacity even when the base material shifts or expands.
• Qualified for seismic design categories A through F - gives engineers and contractors the confidence to use this wedge anchor on projects that require code-compliant performance in high-wind and seismic zones.
• Tested per ACI355.2 and AC193 - meets widely recognized industry testing standards for expansion anchors, supporting use in code-sensitive structural applications.
• Suitable for horizontal, vertical, and overhead installations - offers installation flexibility across a broad range of orientations, reducing the need for different anchor types on a single project.
• Zinc-plated carbon steel construction - provides a corrosion-resistant finish suitable for general-purpose interior concrete and masonry fastening applications.
• Installs with a 5/8 in. drill bit and 15/16 in. wrench - straightforward tooling requirements keep installation simple and minimize setup time on the job site.

Why This Product

• Engineered for cracked concrete conditions - unlike standard expansion anchors, the Strong-Bolt 2 is specifically designed and code listed for use in both cracked and uncracked concrete, making it a reliable choice when long-term structural integrity is a priority.
• Full-range seismic qualification - with approval across all seismic design categories A through F, this anchor is well-suited for structural, commercial, and infrastructure projects where seismic compliance is a code requirement, not just a preference.
• Versatile application coverage in one anchor - rated for horizontal, vertical, overhead, masonry, and seismic applications, this single anchor addresses a wide variety of fastening scenarios, reducing the need to source multiple product types.
• Backed by Simpson engineering and independent testing - tested per ACI355.2 and AC193 by Simpson, a widely trusted name in structural connectors and fastening systems, giving specifiers and installers documented performance data to reference.

Specifications

• Model Number (MPN): STB2-62100F10
• Size: 5/8 in. x 10 in.
• Brand: Simpson Strong-Tie
• Diameter: 5/8 in.
• Length: 10 in.
• Thread Length: 6 in.
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Anchor Body Material: Carbon Steel
• Nut Material: Carbon Steel ASTM A 563, Grade A
• Washer Material: Carbon Steel ASTM F844
• Clip Material: Carbon Steel ASTM A 568
• Installation: Installs with 5/8 in. drill bit and 15/16 in. wrench size
• Packaging: Packs of 10 and Cartons of 60
• Drill Bit Diameter: 5/8 in.

Approved Applications

• Horizontal installations
• Vertical installations
• Overhead installations
• Cracked and uncracked concrete applications
• Masonry applications
• Seismic and high-wind structural applications (seismic design categories A through F)

Frequently Asked Questions

What size drill bit and wrench are required to install the Strong-Bolt 2 STB2-62100F10?

This anchor installs with a 5/8 in. drill bit and requires a 15/16 in. wrench size for proper installation.

Is this anchor rated for use in seismic conditions?

Yes. The Strong-Bolt 2 is qualified for static and seismic loading conditions, covering seismic design categories A through F. It has been tested per ACI355.2 and AC193 and is code listed for cracked and uncracked concrete as well as masonry applications.

What happens if a crack forms at the anchor location after installation?

The dual undercutting embossments on each clip segment enable secondary expansion should a crack form and intersect the anchor location. This feature significantly increases the ability of the Strong-Bolt 2 to carry load if the hole expands, making it especially reliable in dynamic loading environments.

Can this anchor be installed in orientations other than vertical?

Yes. The Strong-Bolt 2 is suitable for horizontal, vertical, and overhead applications, providing installation flexibility across a wide range of structural scenarios.

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