The Simpson Strong-Bolt 2 3/8 in. x 3 in. Mechanically Galvanized Wedge Anchor is a heavy-duty wedge-type expansion anchor engineered for high-load resistance in exterior and demanding environments. Built from mechanically galvanized carbon steel, it features dual undercutting embossments on each clip segment and is tested for reliable performance in uncracked concrete per AC193 and in uncracked masonry per AC01 - making it a dependable choice for structural anchoring across horizontal, vertical, and overhead applications.

Key Features

• Chamfered top designed to prevent mushrooming during installation - protects the anchor threads during driving so the nut seats cleanly and installation goes smoothly without rework.
• Suitable for horizontal, vertical, and overhead applications - gives installers the flexibility to use a single anchor type across multiple orientations on the same job site.
• Mechanically galvanized carbon steel construction - provides enhanced corrosion resistance specifically suited for exterior applications where moisture and weather exposure are a concern.
• Standard (ANSI) fractional sizes compatible with common drill bits and tools - installs with a standard 3/8 in. drill bit, reducing the need for specialty equipment and keeping the installation process straightforward.
• Tested per ACI355.2 and AC193 - independently verified performance standards give engineers and contractors the documentation needed for code-compliant projects.
• Dual undercutting embossments on each clip segment - promotes consistent expansion and secure mechanical interlock in the base material for reliable load transfer.

Why This Product

• Exterior-ready corrosion protection - the mechanically galvanized finish is specifically selected for outdoor and high-exposure environments, making this anchor a direct fit for exterior structural connections without requiring an upgrade to a different product line.
• Verified in both concrete and masonry - with testing in uncracked concrete per AC193 and in uncracked masonry per AC01, this anchor covers a broader range of base materials than anchors tested in only one substrate, reducing the need to source separate fasteners for mixed-material projects.
• Installation-friendly design that reduces errors on site - the chamfered top guards against mushrooming, and compatibility with standard fractional drill bit and wrench sizes means crews can work efficiently without interruption or specialty tooling.
• Trusted Simpson engineering with multi-orientation capability - backed by Simpson's established testing and design standards, this wedge anchor performs across horizontal, vertical, and overhead conditions, simplifying specification and procurement for complex structural anchoring applications.

Specifications

• Size: 3/8 in. x 3 in.
• MPN: STB2-37300MGF50
• Brand: Simpson Strong-Tie
• Anchor Type: Wedge-Type Expansion Anchor
• Diameter: 3/8 in.
• Length: 3 in.
• Thread Length: 1-9/16 in.
• Material: Carbon Steel
• Coating / Finish: Mechanically Galvanized
• Installation Drill Bit: 3/8 in.
• Wrench Size: 9/16 in.
• Testing Standards: ACI355.2, AC193 (uncracked concrete), AC01 (uncracked masonry)
• Packaging: Packs of 50 and Cartons of 250

Approved Applications

• Horizontal installations in uncracked concrete and uncracked masonry
• Vertical installations in uncracked concrete and uncracked masonry
• Overhead installations in uncracked concrete and uncracked masonry
• Exterior applications requiring high-load resistance

Frequently Asked Questions

What drill bit and wrench size are required to install the STB2-37300MGF50?

This anchor installs with a 3/8 in. drill bit and requires a 9/16 in. wrench size for tightening.

Is the Strong-Bolt 2 mechanically galvanized anchor suitable for outdoor or exterior use?

Yes. The mechanically galvanized finish makes this anchor specifically suitable for exterior applications where enhanced corrosion resistance is required.

What base materials can the STB2-37300MGF50 be used in?

This anchor is tested and approved for use in uncracked concrete in accordance with AC193 and in uncracked masonry in accordance with AC01.

What orientations are supported when installing this wedge anchor?

The STB2-37300MGF50 Strong-Bolt 2 is suitable for horizontal, vertical, and overhead applications, providing installation flexibility across a wide range of projects.

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