National Mfg N104-638 Galvanized Box Rail Bracket 5-pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N104-638 is a galvanized single box rail bracket designed for mounting box rail systems on buildings with corrugated metal siding. Sold in a pack of 5, these adjustable brackets include lags for secure fastening. The galvanized steel construction provides corrosion resistance suited to outdoor and agricultural building environments. Installers use these brackets to position and anchor box rail track along exterior walls, enabling sliding door hardware to operate smoothly and correctly. The adjustable design accommodates variations in wall profile and corrugation depth.

These brackets are intended for use on agricultural, commercial, and utility buildings clad in corrugated metal siding. They are specifically designed to mount National 5114 or 5116 box rail, making them a direct-fit component in those sliding door hardware systems. Typical installations include barn doors, equipment shed entrances, and outbuilding sliding doors where corrugated metal exterior walls require an offset or contoured mounting solution. Lags are included, reducing the need for separate fastener sourcing on the job.

Key Features

• Adjustable bracket design accommodates corrugated metal siding profiles
• Galvanized steel construction for corrosion resistance in outdoor environments
• Includes lags for direct mounting to building structure
• Compatible with National 5114 and 5116 box rail systems
• Sold in a pack of 5 units for multi-bracket installations

Compatibility

Designed for mounting National 5114 or 5116 box rail on buildings with corrugated metal siding.

Installation Notes

Installation is typically performed by a general contractor, farmer, or experienced tradesperson familiar with sliding door hardware. Ensure the building wall structure provides adequate backing for lag fasteners before mounting. Position brackets at consistent intervals along the rail run per the rail system requirements. Follow all applicable building codes for fastener penetration depth and structural attachment.