National Mfg N830-446 3.5 in Door Hinge 1/4 Radius Matte Black

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N830-446 is a 3.5-inch SqueakGuard door hinge with a 1/4-radius corner profile, finished in matte black. It is engineered for surface-mounted door installations where silent, long-term operation is the priority. The hinge uses a military-grade bearing rated at five times the strength of standard steel, allowing doors to pivot smoothly and quietly on one edge. Each pack contains three hinges along with mounting hardware and installation instructions. Rated for 30 years of noise-free operation, it is suited for residential interior door applications and light commercial use.

The N830-446 is intended for standard residential and light commercial door installations. The surface-mount design simplifies fitment without requiring specialized tools or mortising, making it accessible for both trade installers and knowledgeable DIYers. The matte black finish suits contemporary interior door hardware sets. Three hinges per pack align with the standard requirement for a single door installation. Mounting hardware is included, so no separate fastener sourcing is required at the job site.

Key Features

• SqueakGuard technology for silent door operation over extended service life
• Military-grade bearing with five times the strength of standard steel
• 3.5-inch hinge size with 1/4-radius corner profile in matte black finish
• Surface-mounted application — no mortising required
• Three-pack format with mounting hardware and instructions included
• Limited Lifetime Warranty coverage from the manufacturer

Compatibility

Designed as an OEM-style replacement or new-install surface-mount door hinge for standard residential interior and light commercial door applications requiring a 3.5-inch, 1/4-radius hinge profile.

Installation Notes

Installation is performed with standard hand tools and does not require mortising or specialty equipment. Ensure the door is properly supported and all fasteners are driven flush before cycling the door. Follow applicable local building codes for door hardware installation in commercial settings. Confirm door weight and frequency of use are within the product rating before installation.