The Simpson 5/8 in. x 5 in. Zinc-Plated Retrofit Bolt from Simpson is a precut threaded rod supplied with a nut and washer, engineered specifically to anchor into existing concrete and masonry when used with Simpson Strong-Tie anchoring adhesives. Capable of handling both tension and shear loads in structural connections, it forms part of a complete engineered anchoring system built for reliable retrofit applications. Each end of the rod is stamped with the rod length in inches and color-coded to indicate the grade or type of steel, making post-installation identification fast and straightforward. At 5/8 in. diameter, this bolt also carries the distinctive No-Equal symbol stamp, an additional mark that sets it apart for easy on-site verification.

Key Features

• Handles both tension and shear loads - supports a wider range of structural connection demands in a single retrofit anchor, reducing the need for supplemental hardware
• Coarse thread type - promotes strong mechanical engagement with adhesive and mating hardware for a secure, reliable hold in concrete and masonry
• 5/8 in. diameter x 5 in. length - a versatile mid-range size suited to common retrofit anchoring depths and connection requirements
• Nut and washer included - arrives as a ready-to-install assembly so you have every component needed for the connection without sourcing parts separately
• Zinc-plated finish - provides a base level of corrosion resistance to help protect the rod during handling, storage, and service in typical interior environments
• Color-coded ends stamped with rod length - allows quick visual identification of bolt length and steel grade post-installation, simplifying inspection and documentation on the job site
• No-Equal symbol stamped on the rod - an additional grade identifier specific to 1/2 in. diameter and larger bolts that makes field verification straightforward even after the anchor is set

Why This Product

• A complete engineered anchoring system in one package - when paired with a compatible Simpson Strong-Tie anchoring adhesive, this retrofit bolt delivers a fully engineered solution for anchoring into existing concrete and masonry, giving contractors and engineers confidence in the overall system performance rather than relying on mixed components
• Built-in identification features reduce post-installation guesswork - the stamped rod length, color-coded grade indicator, and No-Equal symbol mean the bolt can be positively identified after installation, which supports inspection accuracy and project documentation without extra effort
• Dual load capacity in a single anchor - the ability to resist both tension and shear loads makes this retrofit bolt a practical choice for structural connections where loading conditions are not purely axial, helping simplify the anchoring design
• Made in the United States with Grade 36 steel - the defined steel grade provides engineers and specifiers with the material properties needed to perform accurate load calculations and meet project specifications with confidence

Specifications

• MPN: RFB#5X5
• Brand: Simpson Strong-Tie
• Diameter: 5/8 in.
• Bolt Length: 5 in.
• Thread Type: Coarse
• Grade: Grade 36
• Coating: Zinc Plated
• Finish: Zinc Plated
• Country of Origin: United States

Approved Applications

• Anchoring into existing concrete when used with Simpson Strong-Tie anchoring adhesives
• Anchoring into existing masonry when used with Simpson Strong-Tie anchoring adhesives
• Structural connections requiring both tension and shear load resistance

What's Included

Each pack contains (1) RFB#5X5 Retrofit Bolt, Precut threaded rod (5/8 in. x 5 in.), Nut, Washer.

Frequently Asked Questions

What is the Simpson RFB#5X5 retrofit bolt used for?

The Simpson Strong-Tie RFB#5X5 is a precut threaded rod used with anchoring adhesives to anchor into existing concrete and masonry. It is designed to provide both tension and shear load resistance in structural connections, making it suitable for a wide range of retrofit anchoring applications.

Does the RFB#5X5 come with a nut and washer?

Yes. The RFB#5X5 is supplied as a complete unit that includes the precut threaded rod, a nut, and a washer, providing everything needed to complete the anchoring connection alongside the appropriate Simpson Strong-Tie adhesive.

How can I identify the RFB#5X5 after it has been installed?

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, allowing for quick and easy identification post-installation. Because this bolt is 5/8 in. in diameter - 1/2 in. or larger - it also features Simpson Strong-Tie's distinctive No-Equal symbol stamped on the rod.

What adhesive should be used with the Simpson RFB#5X5 retrofit bolt?

The RFB#5X5 should be used with Simpson Strong-Tie adhesives to anchor into existing concrete and masonry. When paired with a compatible Simpson Strong-Tie adhesive, the RFB retrofit bolt delivers a complete engineered anchoring system.

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