3/8 inch x 3-1/2 inch Galvanized Steel Nipple

3/8" x 3-1/2" Galvanized Steel Nipple – Threaded Connector for Pressurized Piping Systems

The 3/8" x 3-1/2" galvanized steel pipe nipple is a straight, male-threaded fitting used to connect two female-threaded components in fluid or gas transport systems. This nipple is fabricated to meet dimensional and mechanical standards for consistent performance in applications requiring moderate pressure and corrosion resistance.

Manufactured from Schedule 40 carbon steel and protected with a hot-dip galvanized coating per ASTM A153, this component provides extended service life in non-potable water, low-pressure air, and heating line applications. Threads conform to ANSI B1.20.1 NPT specifications, ensuring a secure mechanical seal when installed with proper thread sealant.

Key Features

• Material: Carbon steel, hot-dip galvanized
• Nominal Size: 3/8 inch
• Length: 3-1/2 inches overall
• Thread Type: NPT (National Pipe Taper), male both ends
• Wall Thickness: Standard Schedule 40
• Coating: Zinc galvanized for corrosion protection

Installation Guidelines

This nipple should be installed using compatible female-threaded fittings with thread sealant or PTFE tape applied to the male threads. Over-torquing can damage threads or fittings, so torque should be applied using a pipe wrench on the body only—not the threads. System pressure testing is recommended after installation to confirm seal integrity.

Typical Applications

• Low-pressure water distribution lines
• Compressed air service in mechanical or shop systems
• Closed-loop hydronic heating loops (non-potable)
• Industrial systems requiring moderate mechanical strength and corrosion protection

Performance Considerations

• Service Pressure: Suitable for non-shock pressures up to 150 PSI depending on media and temperature
• Temperature Range: -20°F to 350°F (-29°C to 177°C)
• Compliance: Conforms to ASTM A733 for steel pipe nipples; threading per ASME B1.20.1

Note:

Galvanized fittings are not recommended for potable water systems in all jurisdictions due to the potential for zinc leaching and interior corrosion over time. Always verify compatibility with local plumbing codes and media type.

The 3/8" x 3-1/2" galvanized steel nipple offers mechanical integrity and corrosion resistance for connections in piping systems where reliability and service longevity are required. Commonly stocked by commercial plumbing and mechanical contractors for use in new construction and maintenance projects.