National Mfg N222-380 Square U-bolt 3/8x4x3 Zinc 5 Pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N222-380 is a zinc-plated square U-bolt supplied with a plate and hex nuts attached, packaged in a box of five. The U-bolt measures 3/8 inches in diameter with a 4-inch length and a 3-inch inside width, making it suited for clamping applications across rectangular cross-section substrates. The square bend geometry distributes clamping force evenly against flat surfaces, and the included plate and hex nuts simplify assembly by keeping all hardware together. The zinc finish provides basic corrosion resistance for general indoor and light-duty outdoor use. Plumbers, pipefitters, HVAC installers, and general trade contractors commonly use square U-bolts when securing conduit, pipe, or strut to wood or metal framing members.

The N222-380 is designed for securing various products to rectangular wood and metal objects. This makes it a practical fastener choice in HVAC duct support work, pipe hanging, electrical conduit support, and general mechanical mounting where a square-bend U-bolt fits the profile of the object being secured. The 3/8-inch rod diameter provides sufficient load capacity for light to moderate trade applications. Each package contains five U-bolts with plate and hex nuts, allowing multiple fastening points to be completed from a single package.

Key Features

• Square bend geometry for secure contact against flat rectangular surfaces
• 3/8-inch diameter rod with 4-inch leg length and 3-inch inside width
• Zinc finish for corrosion resistance in general-duty applications
• Plate and hex nuts included and attached — no separate hardware required
• Packaged five per box for multi-point installations

Compatibility

Designed for securing various products to rectangular wood and metal objects; suitable as a general-purpose square U-bolt fastener in HVAC, plumbing, electrical, and mechanical support applications.

Installation Notes

Installation is typically performed by HVAC technicians, plumbers, pipefitters, or electricians as part of a support or hanging assembly. Power down or de-energize any associated systems before working in confined or energized areas. Use appropriate hand tools to tighten the hex nuts evenly, alternating sides to keep the plate square against the mounting surface. Follow applicable local mechanical and building codes for support spacing and load requirements.