National Mfg N182-717 Threaded Rod Coupler 5/8-11 Zinc 15-pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N182-717 is a zinc threaded rod coupler designed to join two sections of threaded rod end-to-end in a single continuous assembly. Sized for 5/8-inch diameter rod with 11 threads per inch (UNC coarse thread), this coupler provides a secure mechanical connection in suspended-load and structural applications. Witness holes on the coupler body allow the installer to confirm that both rods are fully threaded into the fitting before load is applied. Sold in a package of 15 units, this coupler is a standard component for licensed electricians, plumbers, HVAC technicians, and general contractors working with threaded rod hanger systems.

This coupler is used wherever threaded rod extensions are needed — suspended ceiling grids, pipe hanger systems, equipment supports, unistrut assemblies, and mechanical room overhead structure. The 5/8-11 UNC sizing is common in medium-to-heavy-duty commercial and industrial installations. The zinc finish provides basic corrosion resistance suitable for interior applications. Each package contains 15 couplers, making it practical for multi-point hanger runs or stocking a service vehicle.

Key Features

• Connects two pieces of 5/8-inch diameter, 11 TPI UNC threaded rod end-to-end
• Witness holes confirm full rod engagement before loading
• Zinc construction provides corrosion resistance for interior use
• UNC coarse thread sizing for broad compatibility with standard threaded rod stock
• Sold in a 15-unit package for multi-point installations

Compatibility

Designed as an OEM-style mechanical connector for standard 5/8-11 UNC threaded rod used in commercial and residential hanger and support applications.

Installation Notes

Installation is performed by licensed tradespeople or qualified contractors working with threaded rod support systems. Thread both rod ends fully into the coupler until visible through the witness holes before applying any load. Follow applicable building codes and engineering load ratings for the specific hanger or support system in use. Do not use in applications requiring corrosion resistance beyond what zinc plating provides without verifying suitability for the environment.