National Mfg N182-675 Threaded Rod Coupler 5/16-18 Zinc 40-pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N182-675 is a zinc threaded rod coupler designed to join two sections of threaded rod into a single continuous length. Built to UNC coarse thread standards at a 5/16-18 thread size, this coupler provides a secure mechanical connection for hanging, bracing, and support applications common in HVAC, plumbing, and electrical rough-in work. The zinc finish offers basic corrosion resistance in standard interior environments. Each package contains 40 couplers, making it a practical choice for contractors stocking up for production work.

Threaded rod couplers like the N182-675 are used wherever two lengths of all-thread rod must be extended or spliced. Typical applications include pipe hanger assemblies, HVAC equipment support drops, strut channel installations, and seismic bracing systems in light commercial and residential construction. The 5/16-18 UNC size is commonly paired with 5/16-inch all-thread rod used for lighter-duty suspension loads.

Key Features

• 5/16-18 UNC coarse thread size for compatibility with standard all-thread rod stock
• Zinc construction provides corrosion resistance in typical interior applications
• Connects two pieces of threaded rod end-to-end for extended reach or splicing
• Package quantity of 40 units suits production-volume trade work
• Larger couplers in the product family include witness holes to confirm full thread engagement

Compatibility

Designed for use with 5/16-18 UNC coarse-thread all-thread rod as an OEM-style mechanical hardware coupler. Suitable for standard rod hanger and support assemblies using 5/16-inch threaded rod.

Installation Notes

Installation is typically performed by HVAC technicians, plumbers, or electricians during rough-in framing and support work. Shut down and de-energize any nearby systems before working on overhead support assemblies. Thread both rod ends fully into the coupler until resistance confirms complete engagement — on applicable sizes, use witness holes to verify. Follow applicable mechanical and building codes for hanger spacing and load ratings.