The Simpson ATR 5/8 in. x 18 in. Zinc-Plated All-Thread Rod is a fully threaded tension transfer element from Simpson engineered for use with Simpson Strong-Tie adhesives in demanding structural anchoring applications. Threaded along its entire length, this zinc-plated steel rod delivers the versatility needed for floor-to-floor holdowns and a wide range of other anchoring solutions where reliable load transfer is critical.

Key Features

• Fully threaded along the entire length - provides maximum engagement at any embedment depth, giving installers flexibility in positioning and load transfer without dead zones along the shaft
• Cut to length for convenience - the rod can be trimmed on site to fit specific installation requirements, reducing waste and eliminating the need to source custom lengths
• Zinc-plated steel construction - the corrosion-resistant coating helps protect the rod during handling, storage, and installation in typical interior structural applications
• UNC Class 2A or 1A thread specifications - conforms to standard Unified National Coarse thread tolerances, ensuring compatibility with standard UNC nuts, couplers, and hardware of the matching size
• Designed for use with Simpson Strong-Tie adhesives - engineered as a paired tension transfer element for adhesive anchor systems, supporting code-compliant structural connections

Why This Product

• Versatile anchoring performance - as a fully threaded rod, it suits a broad range of structural applications from floor-to-floor holdowns to general adhesive anchoring, reducing the need to stock multiple rod types for different jobs
• Site-ready adaptability - the ability to cut this threaded rod to length means crews can adapt to actual field conditions on the fly, keeping installations efficient without special fabrication
• Engineered system compatibility - Simpson designed this all-thread rod specifically as a tension transfer element for use with Simpson Strong-Tie adhesives, so it integrates directly into a tested, coordinated anchoring system rather than requiring guesswork on pairing
• Domestic origin, consistent quality - produced in the United States with a zinc-plated finish and UNC Class 2A or 1A thread standards, this rod meets the dimensional and coating consistency that structural fastening applications demand

Specifications

• Model Number: ATR5/8X18ZP
• Diameter: 5/8 in.
• Length: 18 in.
• Material: Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Thread Type: UNC Class 2A or 1A
• Country of Origin: United States

Frequently Asked Questions

What is the primary function of the Simpson ATR5/8X18ZP all-thread rod?

The ATR5/8X18ZP is a tension transfer element designed for use with Simpson Strong-Tie adhesives. It is fully threaded along its entire length and is suited for structural applications including floor-to-floor holdowns and a wide range of other anchoring solutions.

What thread specification does this all-thread rod use?

This rod conforms to UNC Class 2A or 1A thread specifications, ensuring compatibility with standard UNC fasteners of the appropriate size and finish.

What finish is applied to the ATR5/8X18ZP rod?

The ATR5/8X18ZP features a zinc-plated finish over steel construction. The coated ATR rods are available in either zinc-plated or hot-dipped galvanized finishes.

Can this threaded rod be cut to a custom length?

Yes, the ATR5/8X18ZP is designed to be cut to length for convenience, making it adaptable for a variety of installation requirements.

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