National Marker N222158 Zinc Round U-bolt Pipe Fastener

Product Description

The NATIONAL MARKER N222158 is a zinc-plated round U-bolt designed for hanging and fastening applications across pipe, wood, and structural supports. Part of the National catalog 2190 series, this U-bolt measures 5/16 inches in diameter with a 1-3/4 inch inside width and 4-1/4 inch leg length. Constructed from steel with a zinc finish for corrosion resistance, it ships with plate and hex nuts included. At 0.218 pounds, it is a lightweight but durable hardware component suited for both residential and light industrial use. Licensed tradespeople and maintenance technicians install this fastener in plumbing, automotive, and general mechanical applications.

This U-bolt is appropriate for securing pipe runs in plumbing installations, automotive exhaust and chassis work, and general structural fastening tasks. The pipe size referenced corresponds to the inside diameter of standard pipe, making it straightforward to match to existing piping systems. Its compact dimensions make it well suited for tight spaces where a clean, secure mount is needed. It is sold individually with a minimum order quantity of 5 units.

Key Features

• Zinc-plated steel construction for corrosion resistance in general-duty environments
• Round bend profile provides uniform clamping contact on standard pipe OD
• Plate and hex nuts included — no additional hardware required for basic installation
• Suitable for pipe, wood, and structural fastening in plumbing, automotive, and industrial applications
• Pipe size references correspond to inside diameters of standard pipe for straightforward sizing

Compatibility

Designed as a general-purpose OEM-style round U-bolt for use with standard pipe in plumbing, automotive, and light industrial fastening applications. Pipe size listed reflects the inside diameter of standard pipe.

Installation Notes

Installation is typically performed by plumbers, mechanics, or maintenance technicians using standard hand tools. Always ensure the pipe or workpiece is fully supported and that the mounting surface can carry the intended load before tightening. Verify compatibility with local plumbing or mechanical codes where applicable. Do not overtighten hex nuts, as this can deform the U-bolt bend or damage softer pipe materials.

Technical Specifications

• Bolt Diameter: 5/16 inches
• Inside Width: 1-3/4 inches
• Leg Length: 4-1/4 inches
• Weight: 0.218 pounds
• Material: Steel with zinc plating
• Hardware Included: Plate and hex nuts
• Catalog Series: National 2190 Series
• UPC: 00038613125988
• Sold As: Each, minimum order quantity of 5

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N222158