National Mfg N301-101 Square Steel Tube 1x72 in

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N301-101 is a 1-inch by 72-inch square steel tube built for structural and fabrication applications in the trades. Constructed from hot-rolled plain steel using electric-resistance welding, this tube meets ASTM Specification A513 for mechanical tubing. It weighs 4.89 pounds and is suited for both interior and exterior use. HVAC, plumbing, and general contractors reach for this type of structural tube when building equipment supports, frames, or enclosures that need consistent wall thickness and reliable weld integrity.

This square tube is commonly used in fencing, handrail systems, gate construction, and general framework fabrication. Its 72-inch length works well for standard fence panel heights and single-run handrail segments without splicing. The electric-resistance welded construction provides uniform seam integrity along the full length, making it a dependable choice for load-bearing and aesthetic framing in both residential and light commercial settings. Installers working in outdoor environments benefit from the hot-rolled steel construction, which holds paint and coating treatments well for corrosion protection.

Key Features

• 1-inch by 72-inch square tube profile for fencing, handrails, gates, and frame work
• Hot-rolled plain steel construction for strength and weldability
• Electric-resistance welded seam for consistent wall integrity along the full length
• Meets ASTM Specification A513 for mechanical tubing
• Suitable for interior and exterior applications

Compatibility

Designed as an OEM-style structural component for fencing systems, handrail assemblies, gate frames, and general fabrication applications requiring 1-inch square steel tube stock.

Installation Notes

Installation is typically performed by general contractors, ironworkers, or licensed trades using standard metal cutting and welding equipment. Cut tube to length using a chop saw or angle grinder with an appropriate metal-cutting blade. Wear proper PPE including eye protection and gloves when cutting or welding. Seal or prime cut ends for exterior installations to prevent corrosion at exposed surfaces.