The Simpson 5/8 in. x 10 in. Hot-Dip Galvanized Retrofit Bolt by Simpson is a precut threaded rod supplied with a nut and washer, engineered for anchoring into existing concrete and masonry when paired with Simpson Strong-Tie anchoring adhesives. Each end of the threaded rod is stamped with the rod length in inches and color-coded to indicate the grade or type of steel, enabling quick and easy identification after installation. For this 5/8 in. diameter rod, the distinctive No-Equal symbol is also stamped, and when combined with a compatible Simpson Strong-Tie adhesive, the result is a complete engineered anchoring system built for demanding structural connections.

Key Features

• Handles both tension and shear loads - gives structural connections the versatility to resist forces in multiple directions, reducing the need for supplemental fasteners.
• Coarse thread type - provides strong mechanical engagement with adhesives and mating hardware, supporting reliable load transfer in anchoring applications.
• 5/8 in. diameter rod - a robust size suited for heavy-duty anchoring tasks in concrete and masonry where smaller fasteners may be insufficient.
• 10 in. bolt length - offers meaningful embedment depth, helping achieve the load capacities required by engineered connection designs.
• Washer included - ensures a complete, ready-to-install assembly right out of the package, so no additional hardware sourcing is needed for basic installation.
• Hot-dip galvanized finish - delivers superior corrosion resistance compared to standard zinc plating, making this threaded rod appropriate for challenging or moisture-exposed environments.
• End-stamped with rod length and color-coded steel grade - allows installers and inspectors to confirm bolt identity and material grade quickly after installation, supporting quality control on the job site.

Why This Product

• A complete, engineered anchoring solution - when used with Simpson Strong-Tie adhesives, this retrofit bolt becomes part of a fully engineered system designed specifically for anchoring into existing concrete and masonry, taking the guesswork out of component compatibility.
• Built-in post-installation identification - the stamped rod length and color-coded steel grade indicator, along with the No-Equal symbol, make field verification straightforward, a practical advantage on projects where inspection and accountability matter.
• Hot-dip galvanized protection for demanding conditions - the hot-dip galvanized finish provides a heavier, more durable corrosion barrier than standard coatings, making this threaded anchor rod a dependable choice where long-term performance in harsh environments is a priority.
• Dual load capacity in a single fastener - the ability to carry both tension and shear loads means this retrofit bolt can handle the real-world forces that connections in concrete and masonry structures routinely experience, supporting stronger, more efficient designs.

Specifications

• MPN: RFB#5X10HDG
• Brand: Simpson Strong-Tie
• Diameter: 5/8 in.
• Bolt Length: 10 in.
• Thread Type: Coarse
• Coating: Hot-Dip Galvanized
• Finish: Hot-Dip Galvanized
• Country of Origin: United States

Approved Applications

• Anchoring into existing concrete and masonry using Simpson Strong-Tie adhesives
• Connections requiring both tension and shear load capacity

What's Included

Each pack contains (1) RFB#5X10HDG Hot-Dip Galvanized Retrofit Bolt, Precut threaded rod, Nut, Washer.

Downloads and Resources

• Model No. RFB#5X10HDG Coating/Material. Hot-Dip Galvanized Size (in.) 5/8 x 10 See Specifications

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