National Marker N347-815 Zinc Round U-bolt

Product Description

The NATIONAL MARKER N347-815 is a zinc round U-bolt designed for hanging or fastening pipe, wood, conduit, or other materials to a structural surface. Measuring 0.5 inches in diameter with a 3.5-inch inside width and 6-inch leg length, this U-bolt delivers reliable clamping force across a range of trade and industrial applications. The zinc finish provides basic corrosion resistance for general-purpose use. Plate and hex nuts are included, so the fastener is ready to install out of the package. Plumbers, electricians, HVAC technicians, and general contractors regularly use U-bolts of this type for pipe support, conduit hangers, and equipment mounting tasks.

This U-bolt is suited for both residential and light commercial applications. Common installation scenarios include hanging plumbing pipe runs, securing conduit to framing or unistrut, and fastening tubing or round stock in automotive or fabrication contexts. The included hardware eliminates the need to source separate nuts or backing plates, making it practical for field use. Its 0.5-inch rod diameter is a standard size that fits a wide range of commercial pipe hangers and mounting brackets.

Key Features

• Zinc finish for general corrosion resistance in dry or mildly humid environments
• Includes plate and hex nuts for complete, ready-to-install assembly
• 0.5-inch rod diameter x 3.5-inch inside width x 6-inch leg length
• Suitable for pipe, conduit, wood, and round stock fastening
• Applicable across plumbing, HVAC, electrical, and light automotive uses

Compatibility

Designed as a general-purpose round U-bolt for use in plumbing, automotive, and industrial fastening applications where a 0.5-inch x 3.5-inch x 6-inch zinc U-bolt is specified.

Installation Notes

Install using standard hand tools; torque nuts evenly on both legs to avoid distorting the U-bolt or deforming the pipe or conduit being secured. Power down or depressurize any system before installing U-bolts on active pipe runs or conduit carrying live circuits. Follow applicable plumbing code (IPC) or electrical code (NEC) requirements for pipe hanger spacing and support intervals. Do not use zinc U-bolts in direct contact with dissimilar metals or in highly corrosive environments without appropriate isolation hardware.

Technical Specifications

• Rod Diameter: 0.5 inches
• Inside Width: 3.5 inches
• Leg Length: 6 inches
• Material / Finish: Zinc
• Included Hardware: Plate and hex nuts
• Weight: 0.889 pounds
• Sold As: Each
• UPC: 00038613347816

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N347-815