Designed for structural connections where reliability and code compliance matter, Simpson Strong-Tie CNW Oversized (OST) Coupler Nuts with a zinc-plated finish deliver strength, precision, and corrosion resistance. These heavy-duty couplers are ideal for connecting threaded rods or anchor bolts in a wide range of construction applications.

The zinc-plated coating adds a layer of corrosion protection for interior or light exterior use, making them suitable for commercial and infrastructure projects where durability and performance are critical.

Each coupler includes a Witness hole for visual confirmation that rods are fully engaged, and a built-in positive stop to ensure even installation. The result? A connection you can trust without second-guessing.

Key Features:

• Zinc Plated Finish: Adds corrosion resistance for interior and light exterior environments.
• Oversized Thread End: Marked with “O” to ensure proper fit.
• Witness Hole: Visual check confirms correct installation.
• Positive Stop: Prevents over-threading for balanced, secure connections.
• Versatile Options: Available in multiple diameter sizes to match your threaded rod needs.