National Marker N830424 3 in Square Corner Door Hinge

Product Description

The NATIONAL MARKER N830424 is a 3-inch square corner door hinge built from heavy-gauge cold-rolled steel for lasting strength in demanding installations. It features a 5-knuckle full mortise design with a flush pin for a clean, finished appearance. Countersunk screw holes allow fasteners to sit flush with the hinge leaf surface. The removable pin simplifies door hanging and removal, reducing installation time on the job. This hinge suits interior and exterior door applications where a traditional square corner profile is required.

The N830424 is appropriate for residential and light commercial door installations where a full mortise, square corner hinge is specified. It is commonly installed on passage doors, utility doors, and cabinet-style applications requiring a standard 3-inch hinge footprint. The black finish provides a consistent look on painted or dark-finished door frames. Sold individually, this hinge fits standard mortise cutouts and is compatible with typical wood door jamb and door edge preparations.

Key Features

• Heavy-gauge cold-rolled steel construction for added load strength
• 5-knuckle full mortise design for flush, integrated door mounting
• Square corners match standard mortise cutout profiles
• Flush pin delivers a clean, finished appearance when installed
• Countersunk screw holes allow fasteners to sit flush with the hinge leaf
• Removable pin for easier door installation and removal

Compatibility

Designed as an OEM-style replacement or new-installation hinge for standard 3-inch full mortise square corner door applications in residential and light commercial construction.

Installation Notes

Installation is typically performed by carpenters, general contractors, or maintenance trades using a chisel and drill for mortise preparation. Power down any electric strike or access control hardware before working on the door frame. Ensure mortise depth matches hinge leaf thickness so the installed hinge sits flush with the door edge and jamb surface. Follow applicable building codes for door hardware installation in your jurisdiction.

Technical Specifications

• Hinge Size: 3 inches
• Corner Style: Square
• Design: 5 Knuckle Full Mortise
• Material: Cold-Rolled Steel
• Finish: Black
• Pin Type: Removable Flush Pin
• Screw Holes: Countersunk
• Weight: 0.305 pounds
• Unit of Measure: Each

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N830424