National Marker N830205 3 in Square Corner Door Hinge

Product Description

The NATIONAL MARKER N830205 is a 3-inch square corner door hinge finished in oil rubbed bronze, designed for full mortise installation on interior and exterior doors. Built from heavy-gauge cold-rolled steel, it delivers added strength over standard-gauge hardware. The 5-knuckle design provides smooth, stable pivot action, while the flush pin contributes a clean, finished appearance once installed. Countersunk screw holes allow fasteners to sit flush with the hinge leaf surface. This hinge is sold individually and is appropriate for residential and light commercial door applications where a traditional oil rubbed bronze aesthetic is specified.

This hinge suits standard mortise door applications in residential construction and remodel work. It is appropriate for interior passage doors, closet doors, and light-duty exterior doors where a square corner profile is required. The oil rubbed bronze finish coordinates with period-style and transitional hardware sets. Carpenters, finish contractors, and general contractors are the typical installers. The removable pin simplifies hanging or removal of the door during and after installation.

Key Features

• Heavy-gauge cold-rolled steel construction for increased load capacity and durability
• 5-knuckle full mortise design for stable, smooth door swing
• Square corners match standard mortise cutouts without additional modification
• Flush pin delivers a finished, low-profile appearance
• Countersunk screw holes allow fasteners to sit flush with the hinge leaf
• Removable pin simplifies door installation and removal

Compatibility

Designed as an OEM-style replacement or new-installation hinge for standard full mortise door applications requiring a 3-inch square corner hinge in an oil rubbed bronze finish.

Installation Notes

Installation is performed by carpenters or general contractors using standard woodworking tools including a chisel and router for mortise preparation. Power down any electric strike or access-control hardware associated with the door frame before service. Fasten with appropriately sized wood screws driven into solid door and frame material to ensure full holding strength. Confirm the mortise depth matches the hinge leaf thickness before final seating to avoid binding.

Technical Specifications

• Hinge Size: 3 inches
• Corner Style: Square
• Knuckle Count: 5
• Hinge Type: Full Mortise
• Material: Cold-Rolled Steel
• Finish: Oil Rubbed Bronze
• Pin Type: Removable Flush Pin
• Weight: 0.307 pounds
• Unit of Measure: Each

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N830205