The Simpson 5/8 in. x 5 in. Hot-Dip Galvanized Retrofit Bolt is a precut threaded rod supplied with a nut and washer, engineered for use with Simpson anchoring adhesives to anchor into existing concrete and masonry. Designed as part of a complete engineered anchoring system, this retrofit bolt handles both tension and shear loads in structural connections, making it a dependable solution for concrete and masonry anchoring applications where performance and long-term reliability matter.

Key Features

• Handles both tension and shear loads - supports a wide range of structural connection demands in concrete and masonry without requiring supplemental hardware
• Coarse thread type - provides reliable mechanical engagement in concrete and masonry substrates for a secure, stable anchor
• Precut 5/8 in. x 5 in. threaded rod - arrives ready to install, eliminating field cutting and saving time on the job
• Nut and washer included - delivers a complete fastening assembly out of the package so no additional hardware needs to be sourced separately
• Hot-dip galvanized finish - provides a heavy-duty corrosion-resistant coating suited for exposed or demanding environments where bare steel would deteriorate
• Rod length stamped on each end - allows quick, accurate post-installation identification directly on the rod without relying on packaging or records
• Color-coded steel grade identification - makes it easy to verify the grade or type of steel in the field, reducing the chance of installation errors
• No-Equal symbol stamped on the rod - provides an additional layer of identification for 1/2 in. diameter and larger bolts, supporting quality control and inspection

Why This Product

• A system designed to work together - when paired with a Simpson anchoring adhesive, this retrofit bolt forms a complete engineered anchoring system, giving contractors and engineers a fully coordinated solution rather than a mix of unrelated components
• Built-in field verification - the combination of stamped rod length, color-coded steel grade, and the No-Equal symbol means critical installation details can be confirmed directly on the installed bolt, supporting accuracy and accountability on the job site
• Corrosion protection from the coating up - the hot-dip galvanized finish delivers a thick, durable barrier against corrosion, making these anchoring bolts well-suited for concrete and masonry applications where moisture exposure is a concern
• American-made construction hardware - produced in the United States under Simpson quality standards, this retrofit bolt is a trusted choice for structural concrete and masonry anchoring projects where material sourcing and consistency are priorities

Specifications

• MPN: RFB#5X5HDGP2
• Brand: Simpson Strong-Tie
• Diameter: 5/8 in.
• Bolt Length: 5 in.
• Thread Type: Coarse
• Coating: Hot-Dip Galvanized
• Finish: Hot-Dip Galvanized
• Country of Origin: United States

Approved Applications

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

What's Included

Sold as packs of (2) Hot-Dip Galvanized Retrofit Bolts, Precut threaded rod (5/8 in. x 5 in., Hot-Dip Galvanized), Nut, Washer.

Frequently Asked Questions

What type of anchoring system is the Simpson Strong-Tie RFB retrofit bolt designed for?

The RFB retrofit bolt is designed to be used with Simpson Strong-Tie anchoring adhesives to anchor into existing concrete and masonry, forming a complete engineered anchoring system when the two are used together.

How can the RFB retrofit bolt be identified after installation?

Each end of the threaded rod is stamped with the rod length in inches and is color-coded to indicate the grade or type of steel. For 1/2 in. diameters and larger, the distinctive No-Equal symbol is also stamped on the rod, making post-installation identification quick and easy.

What types of loads does the RFB retrofit bolt support?

The RFB retrofit bolt provides both tension and shear load capacity in connections, making it suitable for a wide range of structural anchoring applications in concrete and masonry.

What corrosion protection does this retrofit bolt offer?

This retrofit bolt features a hot-dip galvanized coating and finish, which provides a durable level of corrosion resistance suited for demanding installation environments.

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