National Mfg N218-222 Threaded Rod 5/16-18x36 Inches

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N218-222 is a 5/16 inch-18 UNC threaded rod measuring 36 inches in length, built for hanging, connecting, clamping, and supporting loads in plumbing, heating, and electrical installations. The rod carries a safe working load of 1,000 pounds and is coated with Weatherguard Protection to resist corrosion in harsh and outdoor environments. The UNC coarse thread pattern is standard across trade fastener applications. Licensed tradespeople and experienced DIYers install this rod in a wide range of light commercial and residential mechanical systems.

This threaded rod is suited for residential and light commercial applications including plumbing hangers, conduit supports, HVAC duct and equipment suspension, and general mechanical system mounting. Its corrosion-resistant coating makes it especially practical for marine environments, outdoor installations, and any setting where moisture exposure is a consistent factor. The rod can be drilled, cut, heated, or shaped on the job site to fit specific installation requirements, giving installers flexibility without requiring pre-fabricated lengths.

Key Features

• 5/16 inch-18 UNC coarse thread pattern compatible with standard trade hardware and fasteners
• 36 inches length is field-cuttable, drillable, and shapeable to meet job-specific requirements
• Weatherguard Protection coating provides corrosion resistance for outdoor and marine use
• Safe working load of 1,000 pounds for reliable load-bearing in mechanical support applications
• Suitable for plumbing, heating, and electrical trade applications

Compatibility

Designed as a general-purpose threaded rod for use with standard 5/16 inch-18 UNC nuts, couplings, and hanger hardware commonly used in plumbing, HVAC, and electrical support systems.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or electricians depending on the application. Always de-energize electrical systems and shut off water or gas supply before installing support hardware in active mechanical systems. Use appropriate thread-cutting tools and eye protection when field-cutting or shaping the rod. Refer to local building codes and applicable standards such as the IPC, IFGC, or NEC for hanger spacing and load requirements.