4.5 in. x 4.5 in. Matte Black Spring Full Mortise Square Corner Door Hinge with Fixed Pin

The Global Door Controls spring full mortise hinges are designed for automatic self-closing door applications with reliable performance. Featuring a durable three-knuckle construction, each hinge offers adjustable spring tension that can be increased or decreased using the included adjusting tool for precise control. For maximum versatility, use three hinges per door, allowing balanced closing force with flexible adjustment across installations.

• Recommended for automatic self-closing door applications
• Made from a solid steel base for enhanced durability
• Square corner hinge with plain bearing and fixed pin
• Designed for full mortise installation with a flush, clean door fit
• Durable steel construction for reliable and consistent performance
• Plain bearing design with non-removable pin for smooth operation
• Thickness: 0.129 in. or 3.3 mm
• Template-aligned screw hole locations for quick mounting, Supplied with wood and machine screws for secure fixing
• Certifications: ANSI / BHMA - K81071F for self-closing hinges, Meets NFPA 80 for 3-hour fire rating, UL listed R19063 for use on “A” label fire-rated doors
• Measures 83 in. in length for high-traffic applications