National Marker N830228 Satin Brass Door Hinge 4 in

Product Description

The NATIONAL MARKER N830228 is a 4-inch satin brass door hinge designed for interior residential door installations. Built from steel, this round-corner hinge features a 1/4-inch corner radius and a removable pin that simplifies hanging and removal without specialized tools. Mounting screws are included. This hinge corresponds to the National Model 512RC and is sold individually, making it straightforward to source single replacements or complete sets for new installations.

This hinge is intended for interior residential doors where a satin brass finish and round-corner profile are required. It suits standard door frames in homes, apartments, and light commercial residential-style construction. The round-corner design eliminates the need to chisel square mortise corners, reducing installation time on wood door frames. Contractors, carpenters, and handymen working on interior finish work will find this hinge a direct fit for common residential door applications.

Key Features

• 4-inch leaf size suits standard interior residential door weight and height requirements
• 1/4-inch round corner radius eliminates square-corner mortise chiseling
• Removable pin design allows fast door removal without dismounting the hinge leaves
• Satin brass finish provides a clean, neutral appearance on interior door frames
• Steel construction for durable everyday use
• Mounting screws included — no separate hardware needed

Compatibility

Designed as an OEM-style replacement or new-installation hinge for interior residential doors requiring a 4-inch, 1/4-inch round-corner mortise hinge. Corresponds to National Model 512RC.

Installation Notes

Installation is performed by carpenters or general contractors as part of interior door hanging. Before installation, confirm the door frame mortise depth matches the hinge leaf thickness to ensure flush seating. Use a sharp chisel or router to prepare the mortise if needed, and drive screws straight to avoid stripping the wood. The removable pin allows the door to be lifted free after both leaves are mortised and secured.

Technical Specifications

• Leaf Size: 4 inches
• Corner Radius: 1/4 inch
• Finish: Satin Brass
• Material: Steel
• Pin Type: Removable
• Weight: 0.547 pounds
• UPC: 00886780009682
• Sold As: Each

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N830228