National Marker N140566 Square Steel Broad Door Hinge

Product Description

The NATIONAL MARKER N140566 is a 3.5-inch square broad butt door hinge built for average-weight door applications. Part of the National catalog 505 series, it features a tight pin design in a plain steel finish. The hinge is sold individually and is a standard component used in residential and light commercial door installation and service work. Its square profile and steel construction make it a straightforward drop-in option for service, replacement, or new installation scenarios where a conventional broad butt hinge is specified.

This hinge is suited for interior and exterior door installations where an average-weight door requires reliable pivot support. It is commonly installed by carpenters, general contractors, and maintenance technicians working on residential entry doors, interior passage doors, and light commercial door assemblies. The 505 series is a catalog-standard product appropriate for both new construction and replacement applications.

Key Features

• 3.5-inch square broad butt profile for average-weight door applications
• Tight pin design keeps the pin fixed and prevents removal when door is closed
• Plain steel finish suitable for painting or use in standard interior applications
• Part of the established National 505 series catalog line
• Sold individually — minimum order quantity of 10 units

Compatibility

Designed as an OEM-style replacement or standard installation hinge for average-weight residential and light commercial doors requiring a 3.5-inch square broad butt hinge.

Installation Notes

Installation is typically performed by carpenters or maintenance technicians using standard hand tools including a chisel, hammer, and screwdriver or drill. Power down any electric door hardware before beginning hinge replacement work. Mortise the door edge and jamb to the correct depth before securing the hinge leaves to avoid binding. Follow applicable local building codes for door hardware installation.

Technical Specifications

• Size: 3.5 inches square
• Material: Steel
• Finish: Plain steel
• Pin Type: Tight pin
• Series: National 505
• Weight: 0.503 pounds
• UPC: 00038613140561

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N140566