1/4 inch x 3 inch Black Steel Nipple

1/4" x 3" Black Steel Nipple – Built for Rugged Performance

The 1/4" x 3" black steel nipple is precision-machined for strength and performance in demanding piping systems. Manufactured to conform with industry standards, this fitting is designed for applications where pressure resistance, reliable threading, and mechanical durability are critical.

Key Performance Features

• Robust Carbon Steel Construction: Made from Schedule 40 welded black steel for use in air, gas, oil, and steam service lines.
• Threaded Ends: NPT (National Pipe Thread) on both ends for compatibility with standard pipe fittings.
• Leak Resistance: Threads are cleanly cut to deliver a tight, consistent seal when used with appropriate sealing compounds.
• High-Temperature and Pressure Tolerance: Suitable for use in systems requiring reliable thermal and mechanical stability.

Specifications

• Size: 1/4" nominal pipe size
• Length: 3 inches
• Material: Welded black steel, ASTM A53 compliant
• Thread Type: NPT male x NPT male
• Wall Thickness: Schedule 40
• Surface Finish: Black lacquer coating for corrosion resistance in dry systems

Installation Considerations

Best installed using thread sealant or PTFE tape to prevent leaks and maintain integrity under pressure. While suitable for general plumbing work, it is commonly used in hydronic heating systems, compressed air lines, and natural gas distribution where code permits. Use standard pipe wrenches or thread machines during assembly, ensuring thread engagement and torque requirements are met.

Common Applications

This black steel nipple is typically used in mechanical, commercial, and industrial installations, including:

• Natural gas or propane supply lines
• Boiler systems and radiators
• Low-pressure steam and air systems
• Process piping in industrial plants

Did You Know?

Black steel is preferred for its ability to withstand high internal pressures and for its strength under thermal expansion, making it a staple in applications where threaded steel connections are specified.

Built to deliver strength, consistency, and safety in mission-critical systems, the 1/4" x 3" black steel nipple is a proven solution for professionals who demand reliability from every fitting. Whether you're working on new construction or a retrofit, this component ensures connections that hold up under pressure.