National Mfg N316-257 Steel Square Tube 1.25x36 in

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N316-257 is a hot-rolled plain steel square tube measuring 1.25 inches x 36 inches, manufactured using electric-resistance welding for consistent weld integrity along the full length. It meets ASTM Specification A513, confirming dimensional and mechanical property standards for structural steel tubing. This tube is suited for both interior and exterior applications where a rigid, weldable steel section is needed. Contractors, fabricators, and experienced DIYers typically work with this tube for light structural and decorative metalwork. At 3.06 pounds, it is manageable for single-person handling and cutting on-site.

This square tube is designed for use in fencing, handrails, framework, and gate construction. Its 1.25-inch profile fits standard fencing and railing layouts where a compact square section is required. The hot-rolled surface is suitable for welding, grinding, and painting without extensive surface prep beyond standard rust-inhibiting priming. It is appropriate for residential and light commercial projects in both covered and exposed outdoor environments.

Key Features

• Electric-resistance welded construction per ASTM A513
• Hot-rolled plain steel for weldability and durability
• 1.25-inch square profile x 36-inch length
• Rated for interior and exterior use
• Suitable for fencing, handrails, gates, and structural framework

Compatibility

Designed as a general-purpose steel square tube for fencing, handrail, gate, and framework fabrication in residential and light commercial applications.

Installation Notes

Installation is typically performed by metal fabricators, contractors, or experienced tradespeople using standard metalworking tools including angle grinders, metal-cutting saws, and MIG or stick welders. Always wear appropriate PPE including eye protection and gloves when cutting or welding. Apply a rust-inhibiting primer or coating promptly after cutting to protect exposed ends from oxidation, especially in exterior installations. Verify local building codes for handrail and fencing structural requirements before final installation.