1/2 inch x 2-1/2 inch Black Steel Nipple

1/2" x 2-1/2" Black Steel Nipple – Schedule 40 Seamless Pipe for Pressure Applications

The 1/2" x 2-1/2" Black Steel Nipple is a precision-machined fitting manufactured from seamless Schedule 40 carbon steel pipe. Designed with male NPT (National Pipe Taper) threads on both ends, it is commonly used for joining pipe sections in systems handling air, water, oil, or gas under pressure in non-corrosive environments.

Fabricated from ASTM A53 Grade B steel and finished with a black oxide coating, this nipple provides the mechanical strength required for structural and industrial applications. Its compact 2-1/2" length makes it suitable for installations where space is limited, while maintaining system integrity.

Key Product Attributes

• ✅ Schedule 40 Wall Thickness – Compliant with standard pressure ratings for general-purpose mechanical and plumbing systems.
• ✅ ASTM A53 Grade B Material – Seamless carbon steel construction supports durability in demanding service conditions.
• ✅ Threaded Ends – Machined to ANSI B1.20.1 standards to ensure compatibility and a reliable seal with other NPT components.
• ✅ Black Oxide Coating – Provides limited corrosion resistance in indoor or dry installations.

Installation Considerations

Use of thread sealant or PTFE tape on male threads is recommended to prevent leakage under pressure. Threads should not be over-tightened to avoid stress cracking or deformation. Proper alignment and secure engagement with compatible female threaded components are essential for maintaining system integrity. Installation in gas systems should comply with applicable codes and regulations.

Typical Applications

• Air compressor lines
• Natural gas and propane distribution (indoor only)
• Hydronic heating loops and boiler connections
• General-purpose water and oil piping

Note:

This product is not suitable for potable water or corrosive environments. For applications involving moisture or chemical exposure, galvanized or coated alternatives should be considered.

Technical Specifications

• Nominal Size: 1/2 inch
• Length: 2-1/2 inches
• Thread Type: NPT male x male
• Material: Seamless carbon steel (ASTM A53 Grade B)
• Finish: Black oxide
• Compliance: ANSI B1.20.1, ASME B36.10M

This black steel nipple is engineered for high-integrity connections where strength and reliability are critical. Ideal for structural, mechanical, and pressure-bearing systems, it supports efficient layout and maintenance of complex piping installations.