National Mfg N225-938 4x4 Ss Square Corner Door Hinge

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N225-938 is a 4-inch x 4-inch stainless steel square corner door hinge designed for full mortise installation on industrial, commercial, and residential doors. Built from heavy-gauge stainless steel, this hinge delivers maximum corrosion resistance, making it well suited for marine environments and other demanding outdoor applications. The non-rising pin design maintains consistent operation over time, and the removable pin simplifies installation and future service. A factory-applied nib on the bottom leaf provides a clean, finished appearance once set in the mortise. Licensed tradespeople and facilities maintenance crews reach for this hinge when longevity in corrosive conditions is the primary concern.

This hinge is appropriate for interior and exterior door installations where moisture, salt air, or chemical exposure would degrade standard steel or zinc hardware. Typical applications include coastal residential entry doors, commercial marine facilities, food-service environments, and any outdoor gate or enclosure where a full mortise hinge is specified. Each pack contains one hinge, sold in a package quantity of three packs per unit of measure.

Key Features

• 4 inches x 4 inches square corner profile for standard full mortise door prep
• Stainless steel construction provides maximum corrosion protection in marine and outdoor settings
• Non-rising pin maintains door alignment through repeated use
• Removable pin design for easier installation and hinge removal
• Heavy-gauge material adds structural strength under sustained load
• Nib on bottom leaf delivers a finished appearance flush to the door edge

Compatibility

Designed as an OEM-style replacement or new-installation hinge for full mortise door applications in industrial, commercial, and residential settings, particularly where corrosion resistance is required.

Installation Notes

Full mortise hinges are typically installed by carpenters, millwork contractors, or licensed general contractors following local building codes. Power down any electric strike or access-control hardware on the door frame before beginning work. Mortise the door edge and frame jamb to the exact leaf dimensions before fastening to ensure a flush fit. Use only stainless steel or compatible fasteners to avoid galvanic corrosion between dissimilar metals in wet or marine environments.