The Simpson 1/2 in. x 10 in. Hot-Dip Galvanized Retrofit Bolt by Simpson is a precut threaded rod supplied with a nut and washer, engineered for use with anchoring adhesives to anchor into existing concrete and masonry. When paired with a Simpson Strong-Tie adhesive, this retrofit bolt forms a complete engineered anchoring system built to handle the demands of structural connections in post-installed applications. 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, making post-installation identification fast and reliable - and for 1/2 in. diameters and larger, the distinctive No-Equal symbol is also stamped on each end.

Key Features

• Handles both tension and shear loads - provides structural versatility across a range of anchoring applications in concrete and masonry connections
• Coarse thread type - promotes strong mechanical engagement with the adhesive for a secure, reliable anchor
• End-stamped rod length and color-coded steel grade markings - allow quick and easy identification of each bolt post-installation, reducing confusion on the job site
• No-Equal symbol stamped on each end (1/2 in. diameter and larger) - offers an additional layer of verification so installers can confirm the correct bolt is in place after the work is done
• Hot-dip galvanized finish - delivers a durable corrosion-resistant coating suited for demanding installation environments
• Designed for use with Simpson Strong-Tie adhesives - pairs with a compatible adhesive system to deliver a fully engineered anchoring solution with predictable, tested performance

Why This Product

• A complete, system-level anchoring solution - when used with Simpson Strong-Tie anchoring adhesives, this retrofit bolt becomes part of a complete engineered anchoring system, giving contractors confidence that every component is designed to work together rather than mixing unmatched parts
• Built-in post-installation identification - the stamped rod length, color-coded steel grade markings, and No-Equal symbol on each end mean inspectors and installers can verify the correct bolt was used even after the pour or fill is complete - a practical advantage that saves time during inspection
• Engineered for the toughest connection demands - with the ability to resist both tension and shear loads, this bolt is a dependable choice for structural anchoring into existing concrete and masonry where connection integrity is non-negotiable
• Hot-dip galvanized for lasting durability - the hot-dip galvanized finish provides corrosion resistance that helps protect the bolt's structural integrity over time, making it a smart investment for exposed or moisture-prone installations

Specifications

• MPN: RFB#4X10HDG
• Brand: Simpson Strong-Tie
• Diameter: 1/2 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 using Simpson Strong-Tie adhesives
• Anchoring into existing masonry using Simpson Strong-Tie adhesives
• Connections requiring both tension and shear load resistance

What's Included

Each pack contains (1) RFB#4X10HDG Hot-Dip Galvanized Retrofit Bolt, Precut threaded rod (1/2 in. x 10 in.), Nut, Washer.

Frequently Asked Questions

What is the purpose of the Simpson Strong-Tie RFB#4X10HDG Retrofit Bolt?

The RFB#4X10HDG is a precut threaded rod supplied with a nut and washer, intended for use with anchoring adhesives to anchor into existing concrete and masonry. When combined with a Simpson Strong-Tie adhesive, it forms a complete engineered anchoring system.

What type of loads does this retrofit bolt support?

The Simpson Strong-Tie RFB#4X10HDG provides both tension and shear load resistance in connections, making it suitable for a variety of structural anchoring applications in concrete and masonry.

How can this 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, enabling quick and easy identification post-installation. For 1/2 in. diameters and larger, the distinctive No-Equal symbol is also stamped on each end.

What finish does the RFB#4X10HDG have, and why does it matter?

The RFB#4X10HDG features a hot-dip galvanized finish, which provides enhanced corrosion resistance, making it appropriate for applications where durability and long-term performance are important considerations.

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