National Marker N100049 Double-acting Spring Door Hinge

Product Description

The NATIONAL MARKER N100049 is a double-acting spring hinge designed for swinging doors that require two-way access and self-closing operation. This 3-inch hinge features a cold-rolled steel construction with a satin brass finish. The tight pin is adjustable, allowing the installer to dial in the desired closing speed for the specific application. Mounting screws are included. This hinge suits residential and light commercial interior doors where hands-free, self-closing function is required, such as kitchen pass-through doors, saloon-style doors, and service corridor entries.

The N100049 is suited for swinging door installations where a door must open in both directions and return to a closed position automatically. Typical applications include restaurant kitchen doors, utility room entries, and commercial service doors. The adjustable closing speed makes it adaptable across a range of door weights and traffic levels. Installation requires only basic hand tools and the included hardware.

Key Features

• Double-acting spring mechanism allows doors to swing in both directions
• Self-closing action returns door to closed position automatically
• Adjustable tight pin controls closing speed for different door weights and traffic conditions
• Cold-rolled steel construction with satin brass finish
• Mounting screws included for straightforward installation
• 3-inch hinge size suits standard interior swinging door applications

Compatibility

Designed as an OEM-style replacement and standard fit for residential and light commercial swinging door installations requiring double-acting spring hinge hardware. Corresponds to National catalog model V127.

Installation Notes

Installation is typically performed by a carpenter, general contractor, or qualified handyman. Power down any electrically operated door hardware before beginning work. Ensure the door frame and door blank are properly mortised or surface-prepped to accept the hinge leaf before fastening. Adjust the tight pin incrementally to achieve the desired closing speed, and test door swing in both directions before completing installation.

Technical Specifications

• Hinge Size: 3 inches
• Finish: Satin Brass
• Material: Cold-Rolled Steel
• Action Type: Double-Acting Spring, Self-Closing
• Closing Speed: Adjustable via tight pin
• Includes: Mounting screws
• Weight: 0.965 pounds
• Sold As: Each

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N100049