3/8 inch x 3 inch Galvanized Steel Nipple

3/8" x 3" Galvanized Steel Nipple – Designed for Structural Integrity in Threaded Systems

The 3/8" x 3" Galvanized Steel Nipple is a straight, externally threaded fitting used to connect two female-threaded pipe ends in non-potable water, air, or gas systems. Manufactured from schedule 40 steel pipe and coated with zinc for corrosion resistance, this fitting is engineered to meet the mechanical and environmental demands of commercial and residential plumbing applications.

Material and Construction

• ✅ Steel Core Fabricated from seamless carbon steel for mechanical strength and impact resistance.
• ✅ Zinc Coating Hot-dip galvanized to ASTM A153 standards for corrosion protection in damp or exposed environments.
• ✅ NPT Threads Machined to ANSI B1.20.1 standards to ensure thread compatibility and tight sealing in pressure-rated systems.

Dimensional and Performance Specifications

• Nominal Size: 3/8 inch
• Length: 3 inches (close-length design for compact applications)
• Thread Type: Male National Pipe Tapered (NPT), both ends
• Material Standard: ASTM A733
• Pressure Rating: Up to 300 psi for water or air applications (dependent on system configuration and temperature)

Installation Recommendations

Apply thread sealant or PTFE tape to both threaded ends prior to installation. Use a pipe wrench to achieve torque without distorting the threads. Ensure that both connected components are properly aligned to prevent cross-threading or mechanical stress. For gas applications, follow applicable local codes and pressure testing procedures after installation.

Typical Applications

This nipple is commonly used in closed-loop hydronic heating systems, non-potable water distribution, fire protection loops, and compressed air lines. It is also suitable for use in mechanical rooms, utility corridors, and outdoor installations requiring corrosion protection.

Additional Notes

Galvanized steel is not recommended for use with potable water systems due to the potential for interior corrosion over time. It is primarily selected for its structural rigidity and abrasion resistance in industrial and municipal plumbing systems where durability is required.

The 3/8" x 3" Galvanized Steel Nipple offers dependable service life and reliable compatibility with standard threaded components in pressure-rated systems. Its uniform zinc coating and precise threading support effective sealing and reduced maintenance cycles.