1/4 inch x 4 inch Black Steel Nipple

1/4 Inch x 4 Inch Black Steel Nipple – Threaded Pipe Segment for Pressure Applications

The 1/4 inch x 4 inch Black Steel Nipple is a precision-cut, schedule-grade fitting designed for joining lengths of threaded pipe in gas, oil, and water supply systems. Manufactured for industrial and commercial use, it features straight male threads on both ends for compatibility with a wide range of black malleable or cast iron fittings.

Application-Focused Design

This nipple supports medium- to high-pressure installations where corrosion-resistant coatings are not required. Commonly installed in fuel gas distribution, compressed air systems, and general fluid handling applications:

• ✅ Thread Conformity: Machined NPT threads ensure proper engagement and sealing with female-threaded components.
• ✅ Standard Black Finish: Mild steel body with black oxide coating for indoor environments where rust protection is not critical.
• ✅ Seamless Construction: Manufactured from seamless pipe stock to minimize potential weak points in pressure systems.

Contractor Advantages

Use of dimensionally consistent pipe nipples like this one improves system reliability and reduces rework:

• ✅ Consistent Wall Thickness: Ensures pressure rating compliance across entire length.
• ✅ Predictable Fitment: Each piece is cut and threaded to meet tolerance requirements for mechanical system assemblies.
• ✅ Time-Efficient Integration: Threaded ends reduce the need for welding or specialized joining techniques in non-critical installations.

Specifications

• Material: Black steel (carbon steel pipe, coated)
• Nominal Size: 1/4 inch NPT
• Length: 4 inches overall
• Ends: Male NPT threads both sides
• Manufacturing Standard: Complies with ANSI B1.20.1 thread specification

Typical Installations

Frequently used in low-pressure steam systems, fuel oil distribution, compressed gas lines, and mechanical room piping layouts. Not recommended for potable water systems unless permitted by local code.

Technical Insight

Black steel is preferred in gas service due to its strength and the absence of zinc-based coatings, which are unsuitable for fuel systems. Thread sealant or pipe dope is typically used to ensure joint integrity under pressure.

The 1/4 inch x 4 inch Black Steel Nipple is a dependable component for contractors requiring consistent quality and dimensional accuracy across system assemblies. Suitable for both new construction and system retrofits within mechanical and utility frameworks.