National Mfg N830-403 4in Satin Brass Security Hinge 5-pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N830-403 is a full mortise security hinge designed for doors requiring a durable, finished-look fastening solution. Built from heavy gauge cold rolled steel, this 4-inch hinge delivers a 55-pound safe working load, making it suited for residential and light commercial door installations. The flush pin design gives a clean finished appearance, and the 5-knuckle construction provides smooth, reliable operation. Each hinge features countersunk screw holes and comes with fasteners included. Licensed contractors and finish carpenters install this type of hinge as part of door hardware rough-in and finish work.

This hinge is appropriate for full mortise door applications in residential construction and renovation projects. The square corner design suits standard door frame prep found in most residential and light commercial settings. The removable pin allows for easier door installation and removal during framing or finish stages. Each package contains 5 hinges, making it practical for multi-door jobs or full door sets. The satin brass finish suits interior door applications where a warm metallic tone is specified.

Key Features

• Heavy gauge cold rolled steel construction for added strength and durability
• 55-pound safe working load rating
• Flush pin design for a clean, finished appearance
• 5-knuckle full mortise design with square corner layout
• Countersunk screw holes with fasteners included
• Removable pin for easier door installation and removal

Compatibility

Designed as an OEM-style replacement or new-installation hinge for standard full mortise door applications requiring a 4-inch square corner hinge with satin brass finish.

Installation Notes

Installation is typically performed by finish carpenters or licensed contractors during door hanging or replacement. Power down any associated electric strike or access control hardware before beginning work on the door frame. A sharp chisel and drill with appropriate bit are standard tools for mortising hinge pockets to the correct depth. Ensure the door is properly supported during pin removal to prevent damage to the frame or door edge.