National Hardware Bright Brass 4-1/2 Spring Hinge, Pack of 6 for General Use

Constructed from sturdy steel, the commercial-grade door hinges with a square corner design, measuring 4-1/2 x 4-1/2 inches, are ideally suited for installation in hallways, entrances, and staircases. Their key feature is their automatic door-closing functionality, serving as a reliable alternative to traditional ceiling-mounted door closers. Thanks to its innovative ratchet adjustment mechanism, the need for a separate locking pin is eliminated, streamlining the setup process.

These hinges adhere to the stringent NFPA 8 standard for three-hour fire-rated doors, mandating at least two spring hinges per door for optimal safety. They have also been UL-listed, certifying their compatibility with doors up to 4 feet by 8 feet in size, capable of supporting a weight of 180 pounds, making them a robust choice for various applications.

Moreover, they conform to ANSI/BHMA's A156.17 Grade 1 standard, ensuring high-quality performance and durability in demanding corridor, entrance, and staircase environments. With their combination of efficiency, strength, and compliance with industry standards, these door hinges are the ideal solution for any facility seeking dependable and secure door operation.

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