National Mfg N179-317 Zinc Threaded Rod 1/4-20 X 12 in

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N179-317 is a 1/4-20 zinc threaded rod measuring 12 inches in length, designed for general fastening, hanging, and anchoring applications across construction and mechanical trades. The rod features UNC coarse threads along its full length and meets ASTM A37 Grade A standards, with a minimum tensile strength of 6 KSI and a safe working load (SWL) of 650 pounds. The zinc finish provides basic corrosion resistance for light-duty indoor use. Plumbers, electricians, HVAC installers, and general contractors reach for threaded rod when hanging pipe, conduit, ductwork, and equipment from overhead structure.

This threaded rod is suited for residential and light commercial installations where a field-adjustable fastening element is needed. It can be drilled, cut, heated, and shaped on site, giving installers flexibility to fit exact run lengths without ordering custom hardware. Sold in a package of 2, it is a practical stocking item for service vehicles and shop bins. Typical applications include pipe hanger assemblies, equipment mounting frames, and strut channel connections.

Key Features

• 1/4-20 UNC coarse thread profile for broad nut and coupling compatibility
• 12 inches length — field-cuttable to exact requirements
• Zinc finish for light corrosion resistance in dry or semi-protected environments
• Meets ASTM A37 Grade A with minimum tensile strength of 6 KSI
• Safe working load (SWL) of 650 pounds
• Can be drilled, cut, heated, or shaped on site without special tooling

Compatibility

Designed as a standard 1/4-20 UNC threaded rod for use with compatible hex nuts, coupling nuts, threaded inserts, and pipe hanger hardware accepting 1/4-20 fasteners.

Installation Notes

Threaded rod installation is common across plumbing, electrical, and HVAC trades and is typically governed by applicable building codes and hanger spacing requirements for the system being supported. Cut rod to length using a hack saw or angle grinder and chase threads at cut ends with a die before assembly to ensure proper nut engagement. Verify that the selected anchor point and fastener hardware are rated for the combined load before installing. Do not exceed the published SWL of 650 pounds for this rod size and grade.