National Mfg N273-896 2.5in Plain Steel Weldable Door Hinge

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N273-896 is a 2.5 inch plain steel door hinge designed for surface application by welding. Manufactured from cold rolled steel, this non-swaged, full mortise hinge features a five-knuckle construction and a tight pin for more secure installations. The weldable design makes it well suited for metal door and frame assemblies where mechanical fasteners are not the preferred attachment method. It is packaged loose in a box and sold in a quantity of 10 units per package, making it a practical choice for contractors and fabricators working on multiple openings.

This hinge is intended for applications where a surface-mounted, weldable hinge is required, such as commercial metal doors, hollow metal frames, gates, or fabricated steel enclosures. The full mortise design allows the hinge to seat flush within a mortised pocket for a clean, low-profile installation. The tight pin configuration adds resistance to pin removal, making it appropriate for higher-security or exterior applications. Licensed contractors and metal fabricators typically install this type of hinge in light commercial or industrial settings.

Key Features

• Weldable, non-swaged construction for surface application by welding
• Full mortise design for flush, low-profile installation
• Five-knuckle configuration for increased bearing surface and durability
• Tight pin design for added security against pin removal
• Cold rolled steel construction provides consistent material integrity
• Packaged loose, 10 units per box for multi-opening projects

Compatibility

Designed as a weldable, full mortise replacement or new-installation hinge for metal doors, hollow metal frames, gates, and fabricated steel assemblies requiring a 2.5 inch plain steel hinge.

Installation Notes

Installation is typically performed by a metal fabricator or licensed contractor using standard welding equipment appropriate for cold rolled steel. Ensure the door and frame assembly is fully de-energized and stable before fitting hinges. Follow applicable building codes and manufacturer weld specifications for joint preparation and fillet size. Do not use this hinge as a drop-in screw-mount replacement without proper surface preparation for welding.