The Simpson ATR 3/4 in. x 24 in. Hot-Dip Galvanized All-Thread Rod is a fully threaded steel tension transfer element engineered for use with Simpson Strong-Tie adhesives in demanding structural applications. From floor-to-floor holdown systems to a wide range of anchoring solutions, this all-thread rod delivers reliable performance where both strength and corrosion resistance are critical - including exterior environments and treated-wood construction where standard hardware may fall short.

Key Features

• Fully threaded along the entire length - threads run end to end, giving you maximum flexibility to position nuts and connectors exactly where your application requires
• Cut to length for convenience - the full 24 in. rod can be trimmed on site, reducing waste and eliminating the need for custom-length special orders
• Hot-dip galvanized finish - provides extra corrosion resistance compared to standard zinc-plated options, making this rod well suited for exterior use and treated-wood applications where moisture and chemical exposure are ongoing concerns
• UNC Class 2A or 1A thread specifications - industry-standard thread class ensures compatibility with a broad range of nuts, connectors, and mating hardware used in structural assemblies
• 3/4 in. diameter steel construction - delivers the structural capacity needed for tension transfer in holdown systems and anchoring applications

Why This Product

• Purpose-built for Simpson Strong-Tie adhesive systems - designed specifically as a tension transfer element for use with Simpson Strong-Tie adhesives, this threaded rod integrates directly into proven holdown and anchoring assemblies without guesswork
• HDG coating for long-term durability in tough environments - the hot-dip galvanized finish goes beyond surface-level protection, making this rod a practical choice for exterior structural connections and treated-wood framing where corrosion is an accelerated concern
• Fully threaded design maximizes on-site versatility - because threads run the entire 24 in. length, contractors can cut the rod to the exact dimension needed and engage hardware at any point along it, reducing material waste and simplifying installation
• Made in the United States to UNC thread standards - domestic production paired with UNC Class 2A or 1A thread specifications supports consistent quality and straightforward compatibility with standard structural hardware

Specifications

• Model Number (MPN): ATR3/4X24HDG
• Brand: Simpson Strong-Tie
• Material: Steel
• Coating / Finish: Hot-Dip Galvanized
• Diameter: 3/4 in.
• Length: 24 in.
• Thread Type: UNC Class 2A or 1A
• Country of Origin: United States

Approved Applications

• Floor-to-floor holdown systems
• Use with Simpson Strong-Tie adhesives as a tension transfer element
• Structural anchoring solutions requiring fully threaded rod
• Exterior applications requiring enhanced corrosion resistance
• Treated-wood construction applications

Frequently Asked Questions

What is the purpose of the hot-dip galvanized finish on this all-thread rod?

The hot-dip galvanization (HDG) finish provides extra corrosion resistance compared to standard zinc-plated finishes, making the ATR3/4X24HDG especially suitable for exterior environments and applications involving treated wood, where exposure to moisture and chemicals is a concern.

Is this rod fully threaded along its entire length?

Yes. The ATR3/4X24HDG is fully threaded along the entire 24-inch length of the rod, which provides maximum flexibility for cutting to the required length and for positioning nuts and connectors anywhere along the rod.

What thread specification does this all-thread rod use?

This rod conforms to UNC Class 2A or 1A thread specifications. When pairing a nut or other hardware with this threaded rod, the material and finish of the mating hardware must match the rod to ensure proper fit and performance.

What types of structural applications is the Simpson ATR3/4X24HDG designed for?

The ATR3/4X24HDG is designed as a tension transfer element for use with Simpson Strong-Tie adhesives. It is suitable for a wide range of structural applications, including floor-to-floor holdowns and various anchoring solutions where a fully threaded, corrosion-resistant rod is required.

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