1/4 inch x 5-1/2 inch Black Steel Nipple

1/4" x 5-1/2" Black Steel Nipple – Threaded Pipe Segment for Gas, Air, and Low-Pressure Applications

The 1/4" x 5-1/2" Black Steel Nipple is a straight pipe fitting with male National Pipe Tapered (NPT) threads on both ends. Manufactured from welded black steel pipe, this nipple is designed to join two female-threaded components in systems requiring rigid, non-potable connections. The fitting is commonly used in mechanical, gas, and low-pressure steam applications where corrosion resistance is not a primary requirement.

Its moderate length is ideal for mid-span spacing or alignment corrections in compact or retrofit systems. This product is intended for use where threaded black steel components are approved by code.

Product Features

• ✅ Nominal Pipe Size: 1/4"
• ✅ Length: 5-1/2" overall
• ✅ Material: Welded Black Steel Pipe (ASTM A53 or equivalent)
• ✅ Thread Type: Male NPT both ends, ANSI/ASME B1.20.1
• ✅ Applications: Fuel gas lines, compressed air systems, low-pressure fluid transfer, HVAC piping

Installation Requirements

Threaded installation requires the use of pipe sealant or PTFE tape to ensure a leak-resistant joint. Avoid over-torquing, which may damage threads or compromise sealing integrity. Ensure all mating threads are clean and correctly aligned prior to tightening. This product is not intended for use in potable water systems unless protected or coated according to local code requirements.

Typical Use Cases

This black steel nipple is used in industrial and commercial applications where black steel piping is permitted, including gas appliance hookups, regulator connections, air compressor systems, and boiler installations. Its size makes it especially useful in systems where short-run spacing adjustments are required between components.

Regulatory and Material Considerations

Complies with industry standards for black steel nipples used in non-potable systems. Check local mechanical or fuel gas codes for approval of black steel in specific applications. Not rated for corrosive media or potable water lines without additional protective measures.

The 1/4" x 5-1/2" Black Steel Nipple offers a durable and reliable threaded connection in systems where precision, rigidity, and pressure tolerance are essential. It is a standard component in commercial and mechanical piping installations requiring dimensional consistency and leak resistance.