National Mfg N830-427 Round Corner Hinge 5/8 Inch Black

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N830-427 is a full mortise door hinge built from heavy-gauge cold-rolled steel for reliable, long-term performance in demanding applications. It features a five-knuckle design with a 5/8 inch radius round corner profile and a flush pin for a clean, finished appearance. Screw holes are countersunk to sit flush with the hinge leaf surface. The removable pin simplifies installation and future service. This hinge ships in a package of 15 units and is suited for interior door applications in residential and light commercial settings where a black finish and round corner geometry are required.

This hinge is a full mortise style, meaning it is set into routed recesses in both the door edge and the door frame. It is appropriate for standard interior doors in residential construction and remodel work. Carpenters, general contractors, and finish carpenters are the typical installers. The black finish and round corner geometry make it a common choice where consistent hardware aesthetics are required across multiple doors in a project.

Key Features

• Heavy-gauge cold-rolled steel construction for added strength and durability
• Five-knuckle design for smooth, stable pivot action
• 5/8 inch radius round corners for clean mortise fitment
• Flush pin delivers a finished, low-profile appearance
• Countersunk screw holes allow fasteners to sit flush with the hinge leaf
• Removable pin for easier installation and future removal

Compatibility

Designed as an OEM-style replacement or new-installation hinge for standard full mortise interior door applications requiring a 5/8 inch radius round corner profile in a black finish.

Installation Notes

Full mortise hinges require routed recesses in the door edge and door jamb sized to accept the hinge leaf thickness and dimensions. A licensed carpenter or experienced finish contractor should verify door prep dimensions before installation. Ensure the door is properly supported and the frame is plumb and square before setting hinges. Follow applicable local building codes for door hardware requirements on fire-rated or egress doors.