The Simpson Strong-Bolt 2 3/8 in. x 3 in. Wedge Anchor in Type 316 Stainless Steel is a high-performance wedge-type expansion anchor engineered for secure, reliable fastening in concrete across a wide variety of demanding service environments. Dual undercutting embossments on each clip segment enable secondary expansion should a crack form and intersect the anchor location, significantly increasing the ability of the Strong-Bolt 2 to carry load if the hole expands. With full Type 316 stainless steel construction throughout every component and code listings covering both cracked and uncracked concrete, this anchor is built to perform where corrosion resistance and structural dependability are non-negotiable.

Key Features

• Code listed for cracked and uncracked concrete applications - gives installers and engineers confidence that this anchor meets code requirements across a broad range of concrete conditions without requiring a separate product for each scenario.
• Dual undercutting embossments on each clip segment - enable secondary expansion if a crack intersects the anchor location, helping the anchor maintain load-carrying capacity even as concrete conditions change.
• Qualified for static and seismic loading conditions (seismic design categories A through F) - makes this anchor suitable for high-wind and seismic applications where anchors must perform under dynamic forces.
• Suitable for horizontal, vertical, and overhead applications - provides installation flexibility so the same anchor works across multiple orientations on a single jobsite.
• Chamfered top designed to prevent mushrooming during installation - helps protect the anchor threads, making installation smoother and reducing the risk of damage that could compromise the connection.
• Standard ANSI fractional sizing at 3/8 in. diameter - fits standard fixtures and installs with a common 3/8 in. drill bit and 9/16 in. wrench, minimizing the need for specialty tooling.
• Tested per ACI355.2 and AC193 - independently verified to meet recognized industry testing standards, giving engineers and contractors reliable performance data to work from.
• Full Type 316 stainless steel construction on every component - anchor body, nut, washer, and clip all share the same corrosion-resistant material, ensuring consistent long-term protection with no weak link in the assembly.

Why This Product

• Engineered for the harshest concrete and environmental conditions - the combination of seismic qualification (categories A through F), cracked concrete code listing, and dual-embossment secondary expansion makes this anchor one of the few wedge anchors built to handle both structural demand and real-world concrete behavior simultaneously.
• All-316 stainless construction eliminates the corrosion weak point - because every single component is manufactured from Type 316 stainless steel, there is no mixed-metal vulnerability that could accelerate corrosion in wet, coastal, chemical, or other aggressive service environments.
• Installs with common tools and no specialty hardware - the standard ANSI 3/8 in. fractional sizing means a 3/8 in. drill bit and a 9/16 in. wrench are all that is needed, reducing setup time and keeping the installation process straightforward for crews in the field.
• Backed by recognized testing standards - ACI355.2 and AC193 compliance means published load values are based on rigorous, standardized testing, giving structural designers the verified data they need to specify this anchor with confidence.

Specifications

• Model Number: STB2-37300S6F50
• Coating/Material: Type 316 Stainless Steel
• Size: 3/8 in. x 3 in.
• Drill Bit Diameter: 3/8 in.
• Thread Length: 1-9/16 in.
• Anchor Body Material: Type 316 Stainless Steel
• Nut Material: Type 316 Stainless Steel
• Washer Material: Type 316 Stainless Steel
• Clip Material: Type 316 Stainless Steel
• Anchor Type: Wedge-Type Expansion Anchor
• Packaging: Packs of 50 and Cartons of 250

Approved Applications

• Cracked concrete installations
• Uncracked concrete installations
• Seismic condition applications
• High-wind condition applications
• Corrosive and demanding service environments requiring stainless steel construction

Frequently Asked Questions

Is the Strong-Bolt 2 STB2-37300S6F50 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, helping to maintain load-carrying capacity.

Why is Type 316 stainless steel used throughout this anchor?

Type 316 stainless steel offers long-lasting corrosion resistance for a wide variety of service environments. All components - the anchor body, nut, washer, and clip - are manufactured from Type 316 stainless steel to ensure consistent corrosion protection throughout the entire assembly.

What drill bit size is required to install the STB2-37300S6F50?

A 3/8" diameter drill bit is required to install this anchor. The anchor itself measures 3/8" x 3" in size.

Can the Strong-Bolt 2 be used in seismic or high-wind applications?

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

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