4 Inch spring adjustable self closing door hinge, manufactured with cold rolled steel, closing speed is adjustable, fits standard cutouts, tension is adjustable, 5/8 inches radius round corners. Hinge is UL approved for fire doors which must use a minimum of 2 spring and one conventional hinge per door. Doors weighing up to 50 pounds require 1 spring hinge, doors up to 85 pounds require 2 spring hinges. Doors up to 110 pounds require 3 spring hinges. Conforms to ANSI/BHMA Standard A156.17-2004. *NFPA-80 requires fire labeled doors to have a minimum of 2 spring hinges. NOTE: All hinges must have pivot points aligned for smooth operation. Always use same hinge sizes.
Product specification\n\n
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| Brand | National Hardware |
|---|---|
| UPC | 038613351028 |
| Model Number | N351-023 |
| Application | For use in basement, garage, kitchen and powder room |
| Feature | Cold-rolled steel hinges with a decorative-plated finish have the added protection of baked-on lacquer, which helps retain the original beauty under ordinary condition |
| Category | HARDWARE |
| Additional Category | Spring Hinges |
| Length | 7.1 |
| Width | 4.2 |
| Height | 1.9 |
| Weight | 0.8 |
