National Marker N139808 Steel Broad Door Hinge 3 Inch

Product Description

The NATIONAL MARKER N139808 is a 3-inch square broad door hinge built for general utility and industrial applications. Constructed from galvanized steel with a brass pin, this hinge is swaged for mortise-style installations, providing a clean fit in routed door and frame pockets. The loose removable pin design allows doors to be pulled off the frame without uninstalling the hinge leaves, which saves time during service, equipment access, or renovation work. Licensed tradespeople and facilities maintenance technicians install this type of hardware on interior and exterior doors in industrial, commercial, and general utility settings.

This hinge suits residential and light industrial door installations where a mortise-mount broad hinge is required. The galvanized finish provides corrosion resistance suitable for humid or moderately exposed environments. The removable brass pin makes this a practical choice on access panels, utility room doors, and equipment enclosures where doors need to be removed periodically without disturbing the mounted hinge leaves. It is sold individually and rated for standard door weight loads appropriate to its 3-inch square leaf size.

Key Features

• 3-inch square leaf profile sized for standard utility and industrial door applications
• Loose removable brass pin allows door removal without uninstalling hinge leaves
• Swaged leaves designed for mortise installation in door and frame
• Galvanized steel construction provides corrosion resistance in humid environments
• Brass pin resists galling and allows smooth pin withdrawal during removal

Compatibility

This hinge is part of the National catalog V504 through V504BC series and is designed as an OEM-style replacement or new-install broad door hinge for general utility and industrial mortise door applications.

Installation Notes

Installation is typically performed by carpenters, millwrights, or facilities maintenance technicians. Power down or de-energize any electrically controlled door hardware before beginning work. Mortise the door and frame to the exact leaf dimensions before seating the hinge to ensure a flush fit. Always confirm the pin is fully seated before hanging the door, and verify door alignment and swing clearance before returning the door to service.

Technical Specifications

• Leaf Size: 3 inches square
• Material: Galvanized steel with brass pin
• Pin Type: Loose removable pin
• Mounting Style: Mortise (swaged leaves)
• Weight: 0.274 pounds
• UPC: 00038613139800

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N139808