National Mfg N100-052 3 Inch Double Acting Spring Hinge 5 Pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N100-052 is a double acting spring hinge designed for swinging doors that require two-way access. The hinge is self-closing, using an internal spring mechanism with an adjustable tension pin that lets the installer dial in the desired closing speed. Finished in oil rubbed bronze, it installs via surface mount with no mortising required, making it a straightforward fit for both new construction and retrofit applications. Each package contains 5 hinges sized at 3 inches. This hardware is typically installed by finish carpenters, general contractors, or experienced DIYers working on interior swinging door applications.

The N100-052 is suited for interior swinging doors in residential and light commercial settings where hands-free, self-closing operation is needed in both directions. Common applications include kitchen pass-through doors, saloon-style doors, and any doorway where traffic flows in two directions. The surface mount design eliminates the need for chiseling a mortise into the door or frame, reducing installation time on retrofit projects. The oil rubbed bronze finish coordinates with standard door hardware in that finish family.

Key Features

• Double acting spring mechanism allows the door to swing and self-close from either direction
• Adjustable tension pin lets the installer set the closing speed without special tools
• Surface mount installation — no mortising required
• Oil rubbed bronze finish for a consistent look with coordinating door hardware
• 3-inch hinge size suitable for standard interior door applications
• Comes in a 5-pack for multi-door jobs or replacements

Compatibility

Designed as a surface mount double acting spring hinge for standard interior swinging doors where no mortise cutout is present or desired. No specific model or system compatibility was provided by the manufacturer for this SKU.

Installation Notes

Installation is performed by a finish carpenter or general contractor using standard hand tools — no chiseling required due to the surface mount design. Ensure the door is properly shimmed and plumb before fastening the hinge leaves to the door and frame. Adjust the tension pin incrementally to achieve the desired closing speed and confirm the door returns fully closed without slamming. Follow applicable local building codes for door hardware in fire-rated or accessibility-required openings.