National Marker N273912 Weldable Door Hinge 3.5in Steel

Product Description

The NATIONAL MARKER N273912 is a heavy-duty weldable door hinge designed for surface mounting on metal applications. This nonswaged hinge features a cold-rolled steel body and a tight, nonremovable steel pin for added security in demanding installations. Measuring 3.5 inches square, the hinge is finished in plain steel and is built for direct weld attachment to metal surfaces. It is well suited for industrial enclosures, access panels, metal doors, and similar fabricated steel assemblies where a bolted hinge flange is not practical or preferred.

This hinge is intended for metalworking and fabrication applications where surface welding is the required mounting method. The nonswaged construction allows flat, consistent contact with the mounting surface, making it a reliable choice for custom-built metal enclosures, gates, and structural access panels. Installation is typically performed by welders and metal fabricators in industrial, commercial, and manufacturing settings.

Key Features

• Nonswaged design for flat surface application and consistent weld contact
• Cold-rolled steel construction for durability in industrial environments
• Tight, nonremovable pin for more secure, tamper-resistant operation
• 3.5-inch square profile for heavy-duty door and panel applications
• Plain steel finish suitable for field painting or coating after installation

Compatibility

Designed as an OEM-style weldable hinge for metal door, gate, and enclosure fabrication applications where surface welding is specified.

Installation Notes

Installation is performed by qualified welders or metal fabricators. Ensure all power to connected electrical enclosures is shut off before beginning work on any energized assembly. Use appropriate PPE and welding equipment rated for the base metal thickness. Confirm weld integrity and full pin engagement before returning the door or panel to service.

Technical Specifications

• Size: 3.5 inches square
• Material: Cold-rolled steel body and steel pin
• Pin Type: Nonremovable
• Hinge Style: Nonswaged
• Finish: Plain steel
• Mounting Method: Surface weld application
• Weight: 0.584 pounds

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N273912