Product Description
Simpson CNW7/8-7/8-OST CNW 7/8 in. to 7/8 in. Oversized Thread Coupler Nut with Witness Hole by Simpson Strong-Tie is engineered to connect threaded rods to one another and to anchor bolts. This coupler nut is designed to exceed the specified minimum tensile capacity of the corresponding bolts and threaded rod, featuring a positive stop to help ensure even threading into each end of the nut and a Witness hole as a reliable means to verify when rods are properly installed. The oversized thread on one end makes this model specifically suited for use with hot-dip galvanized bolts.
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 oversized side
- Rod diameter: 7/8 in. to 7/8 in. with oversized thread
- Height (min.): 2 in.
- Positive stop feature helps ensure proper thread engagement into each end of the nut
- Designed to exceed the specified minimum tensile capacity of the corresponding bolts and threaded rod
Specifications
- MPN: CNW7/8-7/8-OST
- Brand: Simpson Strong-Tie
- Bolt/Rod Diameter: 7/8 in.
- Height (min.): 2 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 CNW7/8-7/8-OST coupler nut?
- The Witness hole serves as a means to verify when rods are properly installed. You tighten the two rods until each all-thread rod is visible through the Witness hole, confirming correct and full engagement on both ends of the coupler nut.
- What does the "OST" designation mean on this coupler nut?
- "OST" indicates that one end of the coupler nut features oversized threads. This oversized end is specifically designed for installation on hot-dip galvanized bolts, which have a larger effective diameter due to their galvanized coating. The oversized end is marked with an "O" so it can be easily identified during installation.
- What rod diameter is the CNW7/8-7/8-OST designed to work with?
- This coupler nut is designed for a rod diameter of 7/8 in. on both ends, with one end featuring oversized threads. It is intended to connect 7/8 in. threaded rods to one another or to 7/8 in. anchor bolts.
- Is the CNW7/8-7/8-OST designed to meet specific strength requirements?
- Yes. Simpson Strong-Tie CNW coupler nuts are designed to exceed the specified minimum tensile capacity of the corresponding bolts and threaded rod, helping ensure structural integrity at the connection point.
Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.
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