National Mfg N100-049 3 Inch Satin Brass Double Acting Spring Hinge

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N100-049 is a double-acting spring hinge designed for swinging doors that require two-way access and automatic self-closing action. Finished in satin brass, this 3-inch hinge mounts directly to the door surface with no mortising required, simplifying installation on both new and retrofit applications. The tight pin is field-adjustable, allowing the installer to dial in the desired closing speed without additional hardware. Each package contains 5 hinges, making it suitable for multi-door projects or complete door sets. It is well suited for interior swinging doors in light commercial and residential settings where controlled, hands-free door closure is needed.

The N100-049 is used on double-action swinging doors common in commercial kitchens, service corridors, retail stockrooms, and residential utility spaces. The surface-mount design means no routing or chiseling is required on the door or frame, reducing labor time on the job. The self-closing spring mechanism keeps doors from remaining open, supporting traffic flow and basic separation between spaces. Installers working on saloon-style, café, or pass-through doors will find this hinge a direct fit for that application.

Key Features

• Double-acting spring mechanism allows the door to swing in both directions and self-close from either position
• Tight pin is adjustable to set closing speed to match the application
• Surface-mount installation requires no mortising of door or frame
• Satin brass finish for a clean, low-glare appearance on interior doors
• Sold in a package of 5 hinges for full door coverage or multi-door jobs

Compatibility

Designed as a surface-mount double-acting spring hinge suitable for interior swinging doors in residential and light commercial applications where self-closing two-way door swing is required.

Installation Notes

Installation is performed by a finish carpenter, general contractor, or qualified handyman using standard fasteners and a screwdriver or drill driver. No mortising or chiseling of the door edge or jamb is required due to the surface-mount design. Adjust the tight pin after initial installation to achieve the desired closing speed and door return behavior before final fastener tightening. Ensure the door is properly aligned and balanced in the frame prior to installing spring hinges to avoid binding or uneven closure.