1/8 inch x 4-1/2 inch Black Steel Nipple

1/8” x 4-1/2” Black Steel Nipple – Threaded Pipe Section for Gas and Mechanical Applications

The 1/8” x 4-1/2” Black Steel Nipple is a straight, threaded pipe segment manufactured from welded black steel pipe, designed for use in low- to medium-pressure piping systems. With male National Pipe Thread (NPT) ends, this component allows for rigid, leak-resistant connections between compatible female-threaded fittings.

This fitting is commonly used in systems transporting air, gas, oil, or non-potable water and is suitable for use in commercial, industrial, and mechanical applications where corrosion protection and pressure integrity are critical.

Key Product Features

• ✅ Nominal Pipe Size: 1/8"
• ✅ Length: 4-1/2" overall
• ✅ Material: Welded black steel pipe (typically ASTM A53 Grade B or equivalent)
• ✅ Ends: Tapered NPT male threads on both ends
• ✅ Application: Gas distribution, air compressor lines, low-pressure steam, and general service piping

Installation Considerations

Prior to assembly, apply thread sealant or PTFE tape to the male threads to ensure a tight, leak-resistant joint. Use proper torque to avoid over-tightening, which can damage threads or lead to joint failure. Ensure alignment and thread engagement comply with applicable standards. Not intended for use in potable water systems due to lack of corrosion-inhibiting coating.

Common Applications

This black steel nipple is frequently specified for natural gas and propane piping, heating and ventilation piping, compressed air systems, and equipment hook-ups in both residential and commercial environments. Its small diameter makes it particularly useful for specialty connections and precise layout requirements.

Standards and Compliance

Manufactured to conform with applicable industry standards for black steel pipe fittings. Check with local mechanical and fuel gas codes for approved use in pressure-rated gas systems.

The 1/8” x 4-1/2” Black Steel Nipple is a reliable solution for joining rigid threaded pipe segments in mechanical and gas distribution systems. Its durable construction and tapered threads provide consistent performance in environments requiring pressure integrity and dimensional accuracy.