National Marker N222182 Zinc Round U Bolt 5/16 in

Product Description

The NATIONAL MARKER N222182 is a zinc-plated round U bolt designed for hanging or fastening components to pipe, wood, and similar substrates. Part of the National catalog 2190 series, this U bolt measures 5/16 inches in diameter with a 2-1/2 inch width and 3-1/2 inch length. It ships with plate and hex nuts included, making it ready for direct installation without sourcing additional hardware. The steel construction with zinc plating provides corrosion resistance suited to both interior and light-duty industrial environments. Plumbers, pipefitters, automotive technicians, and general maintenance trades are the primary installers.

This U bolt is suited for residential and light commercial applications where pipe, conduit, or round stock needs to be secured to a structural surface. Typical uses include pipe hanger installations in plumbing rough-in, automotive exhaust or chassis applications, and general industrial fastening. The pipe sizes listed for this U bolt reference inside diameters of standard pipe, so verify pipe OD before installation to confirm the correct fit. Sold individually with plate and hex nuts included.

Key Features

• Zinc-plated steel construction for corrosion resistance in typical indoor and light industrial environments
• Round bend profile suits standard round pipe and tube stock
• Plate and hex nuts included — no additional hardware required
• 5/16 inch rod diameter handles moderate clamping loads on pipe and wood substrates
• Part of National catalog 2190 series for straightforward cross-reference ordering

Compatibility

Designed as an OEM-style replacement and general-use U bolt for pipe fastening applications; pipe size listings correspond to inside diameters of standard pipe. Verify pipe outside diameter against U bolt inside width before installation.

Installation Notes

Installation is typically performed by plumbers, pipefitters, or maintenance technicians using standard wrenches or sockets. Thread the U bolt around the pipe or substrate, seat the plate, and hand-tighten the hex nuts before bringing them to snug with a wrench — do not overtighten on plastic or thin-wall pipe. Shut off fluid flow and depressurize any active piping before securing hangers or supports. Follow applicable IPC or IFGC guidelines for hanger spacing and support requirements.

Technical Specifications

• Rod Diameter: 5/16 inches
• Inside Width: 2-1/2 inches
• Leg Length: 3-1/2 inches
• Material: Steel with zinc plating
• Bend Style: Round
• Included Hardware: Plate and hex nuts
• Weight: 0.111 pounds
• Catalog Series: National 2190

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N222182