National Mfg N830-426 4 in Square Hinge Black Steel

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N830-426 is a 4-inch square corner hinge built from heavy-gauge cold-rolled steel for reliable load-bearing performance. The flush pin delivers a clean finished appearance, and the five-knuckle, full-mortise design provides stable door swing with minimal play. Countersunk screw holes accept the included fasteners for a flush, professional installation. The removable pin simplifies both installation and future removal without disturbing the door frame. This hinge is suited for residential and light commercial interior or exterior door applications where a durable, trim-profile hinge is required.

The N830-426 is designed for full-mortise door installations where the hinge leaf sits flush within a routed recess in both the door edge and the door jamb. The black finish suits applications where a uniform dark hardware appearance is desired. Each unit is sold individually, with a package quantity of 15 units available, making this hinge practical for high-volume door hardware jobs or multi-door projects.

Key Features

• Heavy-gauge cold-rolled steel construction for added strength and durability
• Five-knuckle, full-mortise design for stable, low-play door operation
• Square corner geometry for standard mortised door and frame installations
• Flush pin provides a clean, finished appearance when installed
• Removable pin allows easy door removal without hinge disassembly
• Countersunk screw holes with fasteners included for complete installation

Compatibility

Designed as an OEM-style replacement or new-installation hinge for standard full-mortise residential and light commercial door applications requiring a 4-inch square corner hinge.

Installation Notes

Installation is typically performed by a finish carpenter or general contractor using a chisel and router to cut the mortise recess to depth before seating the hinge leaf. Ensure the door is secured and the frame is plumb before final fastener seating. Use the included countersunk fasteners to avoid surface protrusion that could prevent proper door closure. The removable pin allows the door to be hung and re-hung without removing the hinge leaves from the door or frame.