The Simpson Strong-Bolt 2 3/4 in. x 12 in. Mechanically Galvanized Wedge Anchor is a heavy-duty wedge-type expansion anchor engineered by Simpson for high-load resistance in exterior concrete and masonry installations. Built from mechanically galvanized carbon steel, this anchor is designed to stand up to moisture and weather exposure, making it a dependable choice for demanding outdoor structural connections. It carries the same dual undercutting embossments on each clip segment as the zinc-electroplated version, and installs with a standard 3/4 in. drill bit and 1-1/8 in. wrench - no specialty tooling required.

Key Features

• Chamfered top design - prevents mushrooming during installation, so the anchor seats cleanly without damaging the fastener head or complicating nut engagement
• Dual undercutting embossments on each clip segment - creates a secure mechanical interlock within the base material, supporting reliable load transfer in concrete and masonry
• Mechanically galvanized carbon steel construction - provides enhanced corrosion resistance over standard zinc electroplating, making this anchor appropriate for exterior applications where moisture exposure is a factor
• Suitable for horizontal, vertical, and overhead applications - gives contractors flexibility to use a single anchor type across multiple installation orientations on the same project
• Standard ANSI fractional sizing - fits common fixtures and works with widely available drill bit and wrench sizes, reducing the need for specialty tools on the job site
• Tested per ACI355.2 and AC193 in uncracked concrete, and AC01 in uncracked masonry - provides verified performance data that engineers and inspectors can reference for code-compliant structural applications
• Installs with a 3/4 in. drill bit and 1-1/8 in. wrench - matches the anchor's nominal diameter for precise hole sizing and full expansion engagement without guesswork

Why This Product

• Built specifically for exterior high-load anchoring - the mechanically galvanized finish delivers a higher level of corrosion resistance than zinc electroplating, making this wedge anchor the right choice when the connection will face ongoing weather or moisture exposure rather than a protected interior environment
• Versatile orientation approvals in a single anchor - tested and approved for horizontal, vertical, and overhead installations, this anchor reduces the number of SKUs a contractor needs to manage on projects with varied anchor placements
• Proven design backed by third-party testing - evaluation per ACI355.2, AC193, and AC01 means performance values are independently verified in both uncracked concrete and uncracked masonry, supporting engineer review and code compliance on structural projects
• Installs with common trade tools - standard ANSI fractional sizing and compatibility with a 3/4 in. drill bit and 1-1/8 in. wrench mean crews can complete installations without sourcing specialty equipment, keeping projects moving efficiently

Specifications

• Model Number: STB2-751200MGF4
• Size: 3/4 in. x 12 in.
• Drill Bit Diameter: 3/4 in.
• Thread Length: 6 in.
• Anchor Body Material: Mechanically Galvanized Carbon Steel
• Nut Material: Carbon Steel ASTM A 563, Grade A
• Washer Material: Carbon Steel ASTM F844
• Clip Material: Carbon Steel ASTM A 568
• Coating: Mechanically Galvanized
• Packaging: Packs of 5 and Cartons of 10

Approved Applications

• Exterior concrete anchoring applications requiring high load resistance
• Uncracked concrete - tested per AC193
• Uncracked masonry - tested per AC01
• Horizontal installations
• Vertical installations
• Overhead installations

Frequently Asked Questions

What type of concrete or masonry can this anchor be used in?

The Strong-Bolt 2 mechanically galvanized anchor is tested and approved for use in uncracked concrete in accordance with AC193, and also in uncracked masonry in accordance with AC01. It is not evaluated for use in cracked concrete or cracked masonry.

What drill bit size is required to install this anchor?

Installation requires a 3/4" diameter drill bit, which matches the anchor's nominal diameter for a proper fit and full expansion engagement.

Why choose the mechanically galvanized version over the zinc-electroplated version?

The mechanically galvanized finish on the anchor body provides enhanced corrosion resistance compared to standard zinc electroplating, making the STB2-751200MGF4 version the preferred choice for exterior applications where the anchor will be exposed to moisture or weather over time.

What orientations are approved for this wedge anchor?

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

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