National Mfg N128-355 8 Inch Heavy Galvanized Strap Hinge

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N128-355 is a heavy-duty galvanized strap hinge built for wide mounting surface applications including barn doors, shed doors, storage bins, tool boxes, and gates. The hinge features a tight brass pin that supports both right-hand and left-hand installation without adjustment. Offset screw holes are engineered into the design to distribute load and reduce the risk of wood splitting during fastening. This is a durable, workhorse hardware component suited for agricultural, storage, and utility enclosure builds.

This hinge is intended for heavy-duty exterior and utility applications where a wide strap profile is required for structural support. Typical installations include barn and shed door sets, large wooden gate panels, storage bin lids, and heavy tool box hardware. The galvanized finish provides corrosion resistance for outdoor or semi-exposed environments. Each package contains 5 hinges, making it practical for full door or gate sets requiring multiple mounting points.

Key Features

• 8-inch strap length designed for wide mounting surface applications
• Galvanized finish for corrosion resistance in outdoor and utility environments
• Tight brass pin supports right-hand or left-hand installation
• Offset screw holes reduce wood splitting and increase pull-out resistance
• Heavy-duty construction rated for barn doors, gates, storage bins, and tool boxes
• Sold in a package of 5 hinges, boxed loose

Compatibility

Designed as a heavy-duty strap hinge replacement or new-installation component for barn and shed doors, wooden gates, storage bins, and heavy-duty tool box applications with wide mounting surface requirements.

Installation Notes

Installation is typically performed by general contractors, agricultural builders, or experienced DIYers using standard wood screws and a drill or screwdriver. Power down any electrically operated gate openers and secure the door or gate panel before mounting. Use the offset screw hole pattern as designed and avoid substituting with a single centered fastener, as this reduces splitting resistance and load distribution. Ensure the mounting surface is structurally sound and of adequate thickness to accept the full fastener length.