The Simpson Strong-Bolt 2 Wedge Anchor in 1/2 in. x 5 1/2 in. Mechanically Galvanized is a wedge-type expansion anchor from Simpson engineered for high-load-resisting connections in exterior and demanding environments. Built from mechanically galvanized carbon steel, it delivers dependable corrosion resistance where zinc-electroplated alternatives may fall short. The same dual undercutting embossments on each clip segment found in the standard version are carried over here, maintaining consistent holding performance. Tested in uncracked concrete per AC193 and in uncracked masonry per AC01, and meeting ACI355.2 standards, this fully assembled anchor is a reliable choice for structural connections that require proven, code-referenced performance.

Key Features

• Chamfered top designed to prevent mushrooming during installation - protects the anchor head during driving so threads and fit are preserved for proper fastening every time.
• Suitable for horizontal, vertical, and overhead applications - gives contractors and builders flexibility to use a single anchor type across multiple installation orientations on the same job.
• Standard (ANSI) fractional sizes - fits standard fixtures and installs with common drill bit and tool sizes, reducing the need for specialized equipment on the jobsite.
• Tested per ACI355.2 and AC193 in uncracked concrete, and per AC01 in uncracked masonry - provides documented, code-referenced load data so engineers and inspectors can specify and approve with confidence.
• Mechanically galvanized carbon steel construction - offers a corrosion-resistant finish suited for exterior applications where long-term durability in exposed conditions is required.
• Installs with a 1/2 in. drill bit and 3/4 in. wrench - matches common tool inventories so installation is straightforward without specialty tooling.

Why This Product

• Exterior-ready corrosion resistance - the mechanically galvanized finish makes this wedge anchor appropriate for high-load connections in outdoor and exposed environments where a standard zinc-electroplated anchor is not the right fit.
• Versatile installation without compromise - tested and approved for horizontal, vertical, and overhead use, this anchor handles varied structural anchoring scenarios without requiring a different product for each orientation.
• Proven performance in concrete and masonry - independent testing to AC193 and AC01 means load capacities are backed by recognized standards, giving engineers, contractors, and inspectors a reliable basis for specification and approval.
• Consistent design with the trusted Strong-Bolt 2 platform - the same dual undercutting embossments and chamfered top found across the Strong-Bolt 2 line are retained here, so teams already familiar with the anchor system can transition to the mechanically galvanized version without retraining or workflow changes.

Specifications

• Size: 1/2 in. x 5-1/2 in.
• MPN: STB2-50512MGF25
• Brand: Simpson Strong-Tie
• Anchor Type: Wedge-Type Expansion Anchor
• Diameter: 1/2 in.
• Length: 5-1/2 in.
• Thread Length: 3-13/16 in.
• Material: Carbon Steel
• Coating / Finish: Mechanically Galvanized
• Installation Drill Bit Size: 1/2 in.
• Wrench Size: 3/4 in.
• Testing Standards: ACI355.2, AC193 (uncracked concrete), AC01 (uncracked masonry)
• Packaging: Packs of 25 and Cartons of 100

Approved Applications

• Horizontal installations
• Vertical installations
• Overhead installations
• High-load-resisting connections in exterior applications
• Anchoring into uncracked concrete (tested per AC193)
• Anchoring into uncracked masonry (tested per AC01)

Frequently Asked Questions

What size drill bit and wrench are needed to install this anchor?

This anchor installs with a 1/2 in. drill bit and requires a 3/4 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 appropriate for high-load-resisting applications in exterior environments where added corrosion resistance is required.

What concrete or masonry conditions is this anchor tested and rated for?

The STB2-50512MGF25 has been tested in uncracked concrete in accordance with AC193 and in uncracked masonry in accordance with AC01, and also meets ACI355.2 and AC193 testing standards.

Can this anchor be installed in orientations other than vertical?

Yes. The Strong-Bolt 2 is suitable for horizontal, vertical, and overhead applications, offering 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.