National Hardware N222-356 Square U-bolt Zinc Plated

Product Description

The NATIONAL HARDWARE N222-356 is a square U-bolt designed to secure loads to rectangular wood or metal objects. Manufactured from steel wire with a zinc-plated finish for corrosion resistance, this fastener ships as a complete assembly with a mounting plate and two hex nuts included. The square profile distributes clamping force evenly across flat surfaces, making it a reliable choice for securing pipe, conduit, cable, or structural members. Electricians, plumbers, and general contractors install this type of fastener during rough-in and finish work where a positive, adjustable connection to wood framing or metal channel is required.

This U-bolt suits light-duty to medium-duty fastening applications in residential and commercial construction. Common uses include anchoring conduit runs to wood studs or unistrut, securing pipe to lumber or structural steel, and mounting hardware to rectangular framing members. The included plate and hex nuts allow for immediate installation without sourcing additional hardware. The zinc finish provides adequate protection in dry interior environments and light-exposure exterior applications.

Key Features

• Square U-bolt profile for positive engagement on rectangular wood and metal surfaces
• Zinc-plated steel wire construction for corrosion resistance
• Complete assembly includes mounting plate and two hex nuts
• Ready to install out of the box with no additional fasteners needed
• Compatible with a wide range of securing and anchoring tasks across multiple trades

Compatibility

Designed as an OEM-style replacement and standard-use fastener for securing conduit, pipe, or structural members to rectangular wood and metal objects in residential and commercial applications.

Installation Notes

Installation is typically performed by electricians, plumbers, or general contractors as part of support and anchoring work. Shut off any energized circuits or depressurize any pipe before working in the immediate area. Hand-tighten the hex nuts evenly to seat the plate flat against the mounting surface, then snug with a wrench without over-torquing, which can deform the U-bolt legs. Follow applicable NEC, IPC, or IFGC requirements for conduit and pipe support spacing.