National Mfg N185-199 Brass Adjustable Spring Hinge 3.5in

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N185-199 is a brass adjustable spring hinge designed to keep doors closed automatically after each use. Measuring 3.5 inches with a 0.25-inch round corner profile, it fits standard hinge cutouts without modification. The built-in spring mechanism provides self-closing action, and closing speed is field-adjustable to suit the door weight and swing requirements. This hinge is sold one per pack and is intended for installation by carpenters, general contractors, or qualified handymen working on door hardware projects in residential and light commercial settings.

This hinge is suited for self-closing door applications in basements, stairways, garage entrances, residential homes, commercial buildings, and apartment complexes. Its adjustable closing speed makes it adaptable to a range of door weights and traffic levels. The 3.5-inch size fits the same cutout as a standard 3.5-inch door hinge, making it a straightforward retrofit on existing doors without requiring new mortise work.

Key Features

• Adjustable closing speed to match door weight and traffic requirements
• 3.5-inch size fits standard hinge mortise cutouts
• 0.25-inch round corner profile for clean fitment
• Brass finish suitable for residential and commercial applications
• Self-closing spring mechanism built into the hinge barrel
• Sold individually, carded for retail or job-site use

Compatibility

Designed as a self-closing replacement or upgrade hinge for standard 3.5-inch hinge cutout doors in residential, commercial, and apartment building applications including basements, stairways, and garage entrances.

Installation Notes

Installation is performed by a carpenter or qualified door hardware installer. Before installing, confirm the door is properly shimmed and aligned in the frame. Use a screwdriver or drill driver with the correct bit to secure hinge screws without over-driving. Adjust closing speed using the tension adjustment mechanism on the hinge barrel per the manufacturer instructions included with the product.