Product Description
Simpson CNW1 1/4 CNW 1-1/4 in. Coupler Nut with Witness Hole by Simpson Strong-Tie is engineered to connect threaded rods to one another and to anchor bolts. These coupler nuts are designed to exceed the specified minimum tensile capacity of the corresponding bolts and threaded rod, delivering reliable structural performance in rod-to-rod and rod-to-anchor applications.
Key Features
- Tighten the two rods until each all-thread rod is visible in the Witness hole
- Positive stop feature that helps ensure proper thread engagement into each end of the nut
- For non-hot-dip galvanized all-thread rod only
- Rod diameter: 1-1/4 in.
- Height (min.): 3 in.
Specifications
- Manufacturer Part Number (MPN): CNW1 1/4
- Brand: Simpson Strong-Tie
- Bolt/Rod Diameter: 1-1/4 in.
- Height (min.): 3 in.
- Coating/Finish: Zinc Plated or Uncoated
- Country of Origin: United States
Options
- 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
- What is the purpose of the Witness hole on the Simpson CNW1 1/4 coupler nut?
- The Witness hole serves as a visual verification method to confirm that threaded rods are properly installed. Installers should tighten the two rods until each all-thread rod is visible through the Witness hole, confirming adequate thread engagement on both ends.
- What does the positive stop feature do?
- The positive stop feature helps ensure even, proper thread engagement into each end of the nut. It acts as a built-in guide so that both rods are threaded to the correct depth, supporting consistent and reliable connections.
- Can the CNW1 1/4 coupler nut be used with hot-dip galvanized all-thread rod?
- No. The CNW1 1/4 coupler nut is designed for non-hot-dip galvanized all-thread rod only. For applications requiring hot-dip galvanized bolts, Simpson Strong-Tie offers OST models with oversized threads on one end specifically for that purpose.
- What finish options are available for the CNW1 1/4 coupler nut?
- The Simpson CNW1 1/4 coupler nut is available in either a Zinc Plated or Uncoated finish, providing flexibility depending on the environmental and project requirements of the application.
Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.
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