N.H N830-445 Surface Mount Door Hinge 3-1/2" Matte Black 3-Pack Steel Square Corner The N.H N830-445 surface mount door hinge delivers heavy-duty performance with a sleek matte black finish, designed for residential doors requiring quiet, reliable operation. Each 3-1/2-inch square-corner hinge features three knuckles, a removable pin for easy door removal, and six screw holes arranged in an arc pattern to maximize holding strength. Built with military-grade composite bearings rated at five times the strength of steel, it provides smooth, noise-free pivoting for decades?tested to outlast standard hinges by three times. Despite being labeled ?surface mount,? it installs into a shallow mortise for secure alignment, and includes all mounting hardware for immediate, tool-ready installation. Ideal for interior or exterior doors in homes, this 3-pack offers durability, silent operation, and long-term dependability. Features - 3-1/2-inch square-corner hinge with matte black finish for modern aesthetics - Removable pin allows quick door removal without hinge disassembly - Military-grade composite bearing delivers 5x the strength of steel - Squeak-Guard? technology ensures 30+ years of silent, smooth operation - Six screw holes in arc configuration enhance mounting stability and load distribution - Includes all mounting screws for out-of-the-box installation - Three-knuckle design balances strength and flexibility for standard door use - Constructed from high-quality steel with 0.125-inch gauge thickness - Compatible with standard 3-1/2" door preparations in residential applications - 3-pack provides complete set for one door (hinges + spare) or multiple light-duty uses Specifications - Brand Name: N.H (National Hardware) - Model Name: N.H N830-445 - Part Number: N830-445 - Product Type: Surface Mount Door Hinge - Material: Steel - Finish: Matte - Color: Black - Corner Shape: Square - Radius: 1/4 in (knuckle radius) - Height: 3-1/2 in - Width: 3-1/2 in - Gauge: 0.125 in - Number of Knuckles: 3 - Number of Screw Holes: 6 - Pin Type: Removable - Mounting Type: Mortise (shallow) - Quantity: 3 - Country of Origin: China - Manufacturer: National Hardware Product Application These hinges are used by homeowners, carpenters, and contractors for installing or replacing hinges on interior and exterior residential doors where quiet, long-lasting performance is essential. Commonly applied to entry doors, bedroom doors, and closet doors, they provide a secure pivot point that resists sagging and wear over time. The removable pin simplifies seasonal door removal for painting or moving furniture, while the arc-pattern screw layout prevents pull-out in softwood frames. Despite their robust bearing system, they maintain a low-profile, contemporary look that complements modern hardware. Trusted for residential strength and backed by decades of silent operation, this hinge set delivers professional-grade reliability with straightforward DIY installation.