The Simpson ATR 1-1/8 in. x 12 in. Zinc-Plated All-Thread Rod by Simpson is a fully threaded tension transfer element engineered for use with Simpson Strong-Tie adhesives. Threaded along its entire 12 in. length, this zinc-plated steel anchor rod is built for structural applications where consistent thread engagement and reliable load transfer are critical - including floor-to-floor holdown systems and a wide range of concrete and structural anchoring solutions. Its UNC Class 2A or 1A thread specification ensures compatibility with standard UNC-threaded hardware, making it a dependable choice for contractors and builders working on demanding structural projects.

Key Features

• Fully threaded along the entire length - provides consistent thread engagement from end to end, giving you maximum flexibility in positioning and load transfer without dead zones
• Cut to length for convenience - allows the rod to be trimmed on the job site to fit your specific application, reducing material waste and simplifying installation
• 1 1/8 in. diameter x 12 in. length - sized for heavy-duty structural anchoring tasks where a robust, precisely dimensioned rod is required
• Zinc-plated steel construction - delivers a corrosion-resistant finish suitable for the structural environments where these rods are typically installed
• UNC Class 2A or 1A thread specifications - conforms to standard unified thread tolerances, ensuring predictable compatibility with appropriately rated UNC nuts and hardware

Why This Product

• Engineered for adhesive anchor systems - designed specifically as a tension transfer element for use with Simpson Strong-Tie adhesives, so it integrates directly into proven holdown and anchoring assemblies without compatibility guesswork
• Full-length threading maximizes installation flexibility - because the rod is threaded end to end, there is no unthreaded shank to work around, giving you freedom to cut, position, and embed the rod at whatever depth your application demands
• Zinc-plated finish pairs function with durability - the protective coating helps resist corrosion in typical structural environments, extending service life and maintaining the integrity of the connection over time
• Domestic manufacturing with standardized thread tolerance - produced in the United States and conforming to UNC Class 2A or 1A specifications, this rod meets recognized industry thread standards for reliable fit with compatible fastening hardware

Specifications

• Model Number (MPN): ATR1-1/8X12ZP
• Brand: Simpson Strong-Tie
• Diameter: 1-1/8 in.
• Length: 12 in.
• Material: Steel
• Coating / Finish: Zinc Plated
• Thread Type: UNC Class 2A or 1A
• Country of Origin: United States

Approved Applications

• Floor-to-floor holdown systems
• Structural anchoring solutions
• Use with Simpson Strong-Tie adhesives as a tension transfer element

Frequently Asked Questions

What is this all-thread rod designed to be used with?

The Simpson Strong-Tie ATR all-thread rod is a tension transfer element designed for use with Simpson Strong-Tie adhesives, making it well suited for structural applications such as floor-to-floor holdowns and a wide range of other anchoring solutions.

Is the rod threaded along its full length?

Yes. The ATR rod is fully threaded along the entire length of the rod, providing consistent thread engagement throughout its 12 in. length.

What finish does this rod have, and why does it matter when selecting a nut?

This rod features a zinc-plated steel finish. When pairing a nut with threaded rod, the material and finish of the nut must match those of the rod to ensure proper fit and performance.

What thread specification does the ATR1-1/8X12ZP conform to?

This all-thread rod meets UNC Class 2A or 1A thread specifications, ensuring compatibility with standard UNC-threaded hardware of the appropriate diameter and class.

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