National Mfg N830-447 3.5 in Door Hinge Matte Black 3 Pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N830-447 is a 3.5-inch, 5/8-inch radius door hinge finished in matte black, designed to allow doors to pivot smoothly and quietly on one edge. This surface-mounted hinge features a military-grade bearing rated at five times the strength of standard steel, delivering long-term performance in high-cycle residential door applications. The squeak-guard design eliminates noise at the pivot point, making it suited for interior door installations where quiet operation is a priority. Each package includes three hinges along with mounting hardware and installation instructions.

This hinge is intended for residential interior door applications where a surface-mount installation is required. The 3.5-inch leaf size fits standard interior door frames, and the 5/8-inch radius corner profile matches common door prep cuts. The matte black finish suits modern and transitional interior design styles. The three-pack format covers a standard single-door install. Licensed contractors, finish carpenters, and knowledgeable DIYers handle this type of installation. The product is also available in satin nickel for alternate finish requirements.

Key Features

• Squeak-guard bearing eliminates noise during operation
• Military-grade bearing construction rated at five times the strength of standard steel
• 3.5-inch leaf size with 5/8-inch radius corners for standard door prep compatibility
• Surface-mount application simplifies installation
• Matte black finish for modern interior door aesthetics
• Includes mounting hardware and instructions; three hinges per pack
• Limited lifetime warranty coverage

Compatibility

Designed as a surface-mount replacement or new-installation hinge for standard residential interior doors requiring a 3.5-inch, 5/8-inch radius hinge profile.

Installation Notes

Installation is performed by finish carpenters or qualified DIYers using a screwdriver or drill driver. Power down any automated door hardware before servicing the door assembly. Verify that the existing door prep and frame mortise match the 3.5-inch leaf and 5/8-inch radius corner profile before fastening. Do not overtighten mounting screws, as this can distort the hinge leaf and affect door swing alignment.