National Mfg N830-445 3.5 in Square Door Hinge Matte Black

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N830-445 is a 3.5-inch square door hinge engineered to eliminate door squeak through a military-grade bearing assembly. The SqueakGuard design uses a bearing rated at five times the strength of standard steel, delivering a noise-free operation rated for 30 years. Each pack contains three hinges finished in matte black. Mounting hardware and installation instructions are included. The surface-mount configuration simplifies installation for both trade professionals handling finish carpentry and knowledgeable DIYers completing door hardware replacement.

This hinge is suited for interior residential door applications where noise reduction and long-term durability are priorities. The square corner profile fits standard door frames calling for a 3.5-inch hinge. The matte black finish coordinates with contemporary hardware finishes. The three-pack format covers a standard single door installation. Surface-mounted application means no mortising is required, reducing installation time on retrofit and new-construction projects alike.

Key Features

• SqueakGuard bearing eliminates door squeak — rated noise-free for 30 years
• Military-grade bearing with five times the strength of standard steel
• 3.5-inch square corner profile for standard residential door frames
• Surface-mount design — no mortising required
• Matte black finish for modern interior hardware compatibility
• Three hinges per pack with mounting hardware and instructions included
• National Hardware Lifespan Limited Lifetime Warranty

Compatibility

Designed as a surface-mount replacement or new-installation hinge for standard residential interior doors requiring a 3.5-inch square corner hinge.

Installation Notes

Installation is performed by carpenters, finish contractors, or experienced DIYers using standard hand tools. Power down any door-related electrical hardware such as electric strikes or access control devices before beginning work. Follow the included mounting hardware instructions and ensure fasteners are driven into solid door frame material for proper load bearing. Do not overtighten screws, as this can strip the mounting surface and reduce hinge performance.