National Marker N139733 Steel Broad Door Hinge 2.5 in

Product Description

The NATIONAL MARKER N139733 is a 2.5-inch square plain steel broad door hinge designed for general utility and industrial applications. Part of the National catalog V504 through V504BC series, this hinge features a removable loose pin that allows doors to be lifted free without removing the hinge from the frame. The body is galvanized steel with a brass pin, providing corrosion resistance suited to light industrial and commercial environments. It is swaged for mortise installations, making it compatible with standard door framing practices used by carpenters, millwrights, and maintenance professionals.

This hinge is suited for residential, commercial, and light industrial door installations where mortise-style mounting is required. The swaged design fits cleanly into routed mortise pockets on door edges and frames, delivering a flush, professional finish. The loose pin configuration is particularly useful in high-traffic service environments where doors may need to be removed frequently without disturbing the mounted leaves. It is sold individually, with a minimum order quantity of 10 units.

Key Features

• Removable loose pin allows door removal without uninstalling the hinge leaves
• Swaged construction designed for mortise installations
• Galvanized steel body with brass pin for corrosion resistance
• 2.5-inch square profile fits standard utility and industrial door applications
• Part of the National V504 through V504BC catalog series

Compatibility

Designed as an OEM-style replacement and general-use hinge for mortise-style door installations in residential, commercial, and light industrial settings.

Installation Notes

Installation is typically performed by carpenters, maintenance technicians, or millwrights using standard chisels and screwdrivers for mortise preparation and fastening. Ensure the door and frame are fully supported before removing the loose pin to prevent uncontrolled movement. Follow applicable building codes for door hardware specifications in commercial or industrial environments. Do not substitute the brass pin with an incompatible material, as this may affect the removable-pin function.

Technical Specifications

• Size: 2.5 inches square
• Material: Galvanized steel body with brass pin
• Mounting Type: Mortise (swaged)
• Pin Type: Removable loose pin
• Weight: 0.189 pounds
• Catalog Series: National V504 through V504BC
• Sold As: Each
• Minimum Order Quantity: 10

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N139733