National Mfg N182-667 Threaded Rod Coupler 1/4-20 Zinc 40-pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N182-667 is a zinc threaded rod coupler designed to join two sections of threaded rod into a single continuous length. Sized for 1/4-20 UNC coarse thread, this coupler provides a secure, fully engaged mechanical connection between rod ends. The hex-body profile allows wrench engagement for tightening, and the zinc construction offers corrosion resistance in typical interior installations. Each package contains 40 individual couplers, making this well-suited for larger jobs or restocking trade inventory. Licensed electricians, HVAC technicians, and plumbers routinely use threaded rod couplers when hanging ductwork, pipe strut, and equipment supports.

Threaded rod couplers in the 1/4-20 size are used across residential and light commercial construction and service work. Common applications include hanging pipe hangers, conduit supports, duct hangers, and equipment mounting rods from strut or beam clamps. The 1/4-20 UNC thread size is standard in many suspended-load applications where moderate load capacity and readily available hardware are priorities. This coupler is typically installed by mechanical and electrical tradespeople working to NFPA 70, IMC, or IFGC support spacing requirements.

Key Features

• 1/4-20 UNC coarse thread for broad compatibility with standard threaded rod stock
• Zinc construction provides corrosion resistance in dry and typical interior environments
• Designed to connect two pieces of threaded rod end-to-end
• Larger couplers in this product line include witness holes to confirm full rod engagement
• Package quantity of 40 units supports multi-point installations and job-site stocking

Compatibility

Designed for use with standard 1/4-20 UNC threaded rod commonly used in mechanical, electrical, and plumbing support applications.

Installation Notes

Installation does not require specialized tools beyond a wrench or pliers sized to the coupler flats. Before beginning overhead support work, verify that the supporting structure meets load requirements per applicable mechanical or electrical codes. Thread both rod ends fully into the coupler until engagement is confirmed, using witness holes where present on larger sizes. Do not exceed the load rating of the rod or connected hardware.