National Mfg N222-364 Square U-bolt 5/16x2x5 Zinc 5-pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N222-364 is a 535-series zinc square U-bolt supplied with plate and hex nuts attached. It measures 5/16 inches in diameter with a 2-inch width and 5-inch leg length, making it a standard choice for securing pipe, conduit, tubing, or structural members to rectangular wood or metal surfaces. The zinc finish provides basic corrosion resistance for general-purpose indoor and light outdoor applications. Each package contains 5 U-bolts with their mounting hardware included, reducing time spent sourcing nuts and plates separately. Plumbers, HVAC technicians, and general contractors install this fastener type wherever a round or square section needs to be clamped against a flat backing member.

This U-bolt is suited for residential and light commercial installations where a square-bend profile is required. The square geometry seats flush against flat or rectangular structural members, making it appropriate for securing pipe runs, strut assemblies, ductwork supports, or equipment mounting brackets to wood framing or metal substrates. The included plate and hex nuts allow direct installation without additional hardware. Sold in a boxed-loose pack of 5 units.

Key Features

• Square-bend profile seats flush against rectangular wood and metal surfaces
• Plate and hex nuts included — no additional hardware required
• Zinc finish for general corrosion resistance
• 5/16-inch rod diameter with 2-inch inside width and 5-inch leg length
• Pack of 5 units per box

Compatibility

Designed as a general-purpose square U-bolt for securing pipe, conduit, tubing, and structural members to rectangular wood or metal objects.

Installation Notes

Installation is performed by tradespeople including plumbers, pipefitters, and HVAC technicians during pipe support and equipment mounting work. Always de-energize or isolate the system being secured before installing or adjusting U-bolt clamps. Thread hex nuts evenly on both legs to avoid cocking the plate, and tighten to a snug, even fit without over-driving into the mounting substrate. Follow applicable mechanical and building codes for pipe support spacing and fastener requirements.