The Simpson ATR All-Thread Rod 1-1/4 in. x 18 in. from Simpson is a fully threaded fastening rod engineered for tension transfer in structural and general construction applications. Cut to a ready-to-use 18-inch length and threaded from end to end, this 1-1/4 in. diameter rod gives installers maximum flexibility when positioning nuts, connectors, or hardware anywhere along its length. Built from uncoated black steel and meeting UNC Class 2A or 1A thread specifications, this rod is a dependable choice for demanding fastening and tension transfer tasks.

Key Features

• Fully threaded along the entire length - nuts and connectors can be positioned anywhere on the rod, eliminating the limitations of partially threaded fasteners
• Cut to a convenient 18-inch length - arrives ready to install without requiring additional cutting in most standard applications
• 1-1/4 in. diameter - provides substantial load-bearing capacity suited to structural tension transfer needs
• Uncoated black steel construction - delivers solid, reliable strength for interior structural applications where a coating is not required
• UNC Class 2A or 1A thread specifications - ensures consistent, predictable thread fit with compatible nuts and hardware meeting the same standard

Why This Product

• Purpose-built for tension transfer - the ATR is specifically designed for this demanding structural role, making it a purposeful choice rather than a generic substitute for threaded fastening tasks
• End-to-end threading means total installation flexibility - because no portion of the rod is left unthreaded, fasteners and connectors can be set at any point along the rod to suit your exact layout
• Available across a wide diameter range - the ATR series spans from 3/8 in. up to 2 in. diameter, so this 1-1/4 in. rod is part of a consistent, scalable product family when mixed sizes are needed on a job
• Made in the United States - domestic production supports quality consistency and traceability for projects where origin documentation matters

Specifications

• Model Number: ATR1-1/4X18
• Diameter: 1-1/4 in.
• Length: 18 in.
• Material: Uncoated Steel
• Finish: Uncoated Steel
• Thread Type: UNC Class 2A or 1A
• Country of Origin: United States

Frequently Asked Questions

What is the primary purpose of the Simpson ATR All-Thread Rod?

The Simpson Strong-Tie ATR is a fully-threaded rod designed for tension transfer. It is ideal for a variety of structural applications where a threaded rod running the full length of the fastener is required.

Is this rod threaded along its entire length?

Yes. The ATR rod is fully threaded along its entire 18-inch length, providing maximum flexibility for positioning nuts and connectors anywhere along the rod.

What material and finish does the ATR1-1/4X18 feature?

This rod is made from uncoated black steel with no additional coating or finish applied.

What thread specification does this rod use?

The ATR1-1/4X18 meets UNC Class 2A or 1A thread specifications. When pairing a nut with this threaded rod, the material and finish of the nut must match the rod to ensure proper fit.

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