National Mfg N222-372 Square U-bolt 3/8x3x7 Zinc 5 Pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N222-372 is a zinc-plated square U-bolt that ships with plate and hex nuts already attached, making it a ready-to-install fastener for trade and light industrial applications. Sized at 3/8 inch diameter with a 3-inch inside width and 7-inch leg length, this U-bolt is designed to secure pipe, conduit, tubing, or other cylindrical and rectangular stock to wood or metal framing members. The 657-series zinc finish provides corrosion resistance suitable for interior and protected exterior environments. Each package contains 5 fasteners, sold as a boxed loose unit pack.

This U-bolt is commonly used by plumbers, electricians, HVAC technicians, and general contractors when anchoring runs of pipe or conduit to structural members, equipment frames, or support channels. The square-bend geometry conforms to rectangular tubing and lumber profiles, providing a stable, low-rattle hold. At 2.34 pounds per 5-pack, these are a practical stocking item for service vans and supply rooms. The included plate and hex nuts eliminate the need for sourcing separate hardware before installation.

Key Features

• Square-bend profile fits rectangular wood and metal objects securely
• Zinc finish provides corrosion resistance for indoor and protected outdoor use
• Plate and hex nuts included — no additional hardware required
• 3/8 inch diameter rod stock for solid clamping strength
• Packaged 5 per box for convenient stocking and job-site use

Compatibility

Designed for securing pipe, conduit, tubing, and similar cylindrical or rectangular objects to wood and metal structural members in general mechanical, plumbing, and electrical installations.

Installation Notes

Installation is typically performed by plumbers, electricians, or HVAC technicians following applicable code requirements such as the NEC or IPC for support spacing. Ensure the mounting surface is structurally sound before fastening. Snug hex nuts evenly on both sides of the plate to avoid canting the U-bolt under load. Do not overtighten on plastic or thin-wall conduit, as the square-bend profile concentrates clamping force along the contact edges.