National Mfg N139-873 3.5 in Steel Removable Pin Broad Hinge

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N139-873 is a 3.5-inch plain steel removable pin broad hinge designed for full mortise door installations. Manufactured from cold rolled steel, this five-knuckle hinge features a loose pin design that allows doors to be removed from the frame without taking the hinge itself off the door or jamb. It is swaged for mortise installations, providing a flush, clean fit. Licensed contractors, carpenters, and door hardware installers use this hinge in commercial and residential framing applications where easy door removal is a routine service requirement.

This hinge is suited for mortise-style door installations in both residential and light commercial settings. The full mortise design requires a routed recess in the door edge and jamb, making it a standard choice for hollow-core and solid wood door hanging. It is packaged loose in a box and sold in a quantity of 10 units per package, making it practical for multi-door projects or maintenance stock.

Key Features

• Loose removable pin allows door removal without uninstalling the hinge leaves
• Full mortise design for flush, recessed installation in door edge and jamb
• Swaged knuckles ensure proper leaf alignment during mortise fitment
• Five-knuckle construction for added bearing surface and durability
• Cold rolled steel construction for consistent strength and finish
• Packaged loose in box, 10 units per package

Compatibility

Designed as an OEM-style replacement or new-installation broad hinge for standard full mortise door applications requiring a 3.5-inch hinge with a removable pin.

Installation Notes

Installation is typically performed by carpenters, door hardware installers, or general contractors. Mortise the hinge leaf recesses into both the door edge and the door jamb to the correct depth before fastening. Ensure all fasteners are fully seated and the pin is fully inserted before testing door swing. Follow applicable local building codes for door hardware in commercial occupancies.