Product Description
The Simpson Strong-Tie CNW3/4-3/4-OST Coupler Nut is engineered to connect threaded rods to one another and to anchor bolts with confidence and precision. Designed to exceed the specified minimum tensile capacity of the corresponding bolts and threaded rod, this 3/4 in. to 3/4 in. coupler nut features oversized threads on one end for seamless installation onto hot-dip galvanized bolts. A built-in positive stop ensures even threading into each end of the nut, while the signature Witness hole provides a reliable visual means to verify that rods are properly and fully installed before load is applied.
Key Features
- Tighten the two rods until each all-thread rod is visible in the Witness hole
- Oversized threads on one end for installation on hot-dip galvanized bolts
- OST couplers are oversized on one end of the coupler nut only and will be marked with an "O" on the oversized side
- Rod diameter: 3/4 in. to 3/4 in. with oversized thread
- Height (min.): 1-3/4 in.
- Positive stop feature helps ensure proper thread engagement into each end of the nut
- Designed to exceed the specified minimum tensile capacity of corresponding bolts and threaded rod
Specifications
- Manufacturer Part Number (MPN): CNW3/4-3/4-OST
- Brand: Simpson Strong-Tie
- Rod Diameter: 3/4 in. to 3/4 in.
- Height (Min.): 1-3/4 in.
- Thread Type: One side oversized (OST)
- Finish / Coating: Zinc Plated or Uncoated
- Country of Origin: United States
Approved Applications
- Connecting threaded rods to one another in structural applications
- Connecting threaded rods to anchor bolts
- Use with hot-dip galvanized bolts where oversized thread clearance is required
- Available in standard strength and high strength depending on corresponding rod in use
- Couplers available with oversized threads on one end for installation on hot-dip galvanized bolts (See 'OST models for ordering)
- OST couplers are typically oversized on one end of the coupler nut only and will be marked with an "O" on oversized side
Frequently Asked Questions
Q: How do I know when the threaded rods are properly installed in the coupler nut?
A: The CNW3/4-3/4-OST features a Witness hole that provides a visual verification point. Tighten the two rods until each all-thread rod is visible through the Witness hole, confirming full and proper engagement.
Q: What does "OST" mean on this coupler nut?
A: OST stands for Oversized Thread. On the CNW3/4-3/4-OST, one end of the coupler nut features oversized threads specifically designed for installation on hot-dip galvanized bolts, which have a slightly larger diameter due to their coating. The oversized end is marked with an "O" for easy identification.
Q: Can this coupler nut be used with standard and high-strength threaded rods?
A: CNW coupler nuts are available in standard strength and high strength options depending on the corresponding rod in use. Verify the correct strength grade for your specific application requirements.
Frequently Asked Questions
- What is the purpose of the Witness hole on this coupler nut?
- The Witness hole provides a visual means to verify that each threaded rod is properly and fully installed. When tightening the two rods, you should tighten them until each all-thread rod is visible through the Witness hole, confirming correct thread engagement before load is applied.
- What does "OST" mean, and how do I identify the oversized end of this coupler nut?
- OST stands for Oversized Thread. This coupler nut features oversized threads on one end only, which allows it to be installed onto hot-dip galvanized bolts. The oversized side of the nut is marked with an "O" so it can be easily identified during installation.
- What rod diameter is this coupler nut designed for, and what is its minimum height?
- This coupler nut is designed for a rod diameter of 3/4 in. on both ends, with one end featuring oversized threads. The minimum height of the nut is 1-3/4 in.
- What finish options are available for this coupler nut?
- The CNW3/4-3/4-OST coupler nut is available in Zinc Plated or Uncoated finish. Note that the oversized thread end is specifically designed for use with hot-dip galvanized bolts, such as the SSTB-HDG anchor bolt.
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