National Marker N100052 Spring Door Hinge 3 in Oil Rubbed Bronze

Product Description

The NATIONAL MARKER N100052 is a double-acting, self-closing spring hinge designed for swinging doors that require two-way access. Constructed from cold-rolled steel with an oil rubbed bronze finish, this 3-inch hinge features an adjustable tight pin that allows the installer to dial in the desired closing speed. Mounting screws are included. This type of hinge is commonly installed by carpenters, general contractors, and facility maintenance technicians on interior swinging doors in commercial and residential settings.

This hinge is suited for swinging door applications where hands-free, automatic closing is required from either direction. The adjustable closing speed makes it adaptable to a range of door weights and traffic frequencies. Typical installations include kitchen pass-through doors, service corridor doors, and other interior doors requiring two-way swing and self-closing function.

Key Features

• Double-acting spring mechanism allows door to swing and self-close from both directions
• Adjustable tight pin lets the installer set desired closing speed on site
• Cold-rolled steel construction for structural rigidity
• Oil rubbed bronze finish for corrosion resistance and appearance
• Mounting screws included — no additional hardware required
• Sold individually (each)

Compatibility

Designed as an OEM-style replacement or new-installation hinge for interior swinging doors requiring double-acting, self-closing function. Corresponds to National catalog model V127.

Installation Notes

Installation is typically performed by a carpenter or general maintenance technician using standard hand tools. Ensure the door is properly supported and the frame is plumb and square before mounting. Adjust the tight pin after initial installation to achieve the desired closing speed before returning the door to service. Follow applicable local building codes for door hardware requirements in commercial applications.

Technical Specifications

• Hinge Size: 3 inches
• Action Type: Double-acting, self-closing
• Material: Cold-rolled steel
• Finish: Oil rubbed bronze
• Weight: 0.976 pounds
• Unit of Measure: Each
• UPC: 00886780014341

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N100052