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

1/4" x 4-1/2" Black Steel Nipple – Threaded Pipe Fitting for Gas and Mechanical Systems

The 1/4" x 4-1/2" Black Steel Nipple is a precision-cut, straight pipe segment with male National Pipe Taper (NPT) threads on both ends. Constructed from welded black steel pipe, this fitting is designed for use in non-potable systems including gas, air, low-pressure steam, and oil distribution networks. Its compact diameter and mid-range length allow it to function in tight assemblies or as an extension within rigid piping configurations.

Product Features

• ✅ Nominal Pipe Size: 1/4"
• ✅ Length: 4-1/2" overall
• ✅ Material: Welded black steel (typically ASTM A53 Grade B)
• ✅ Ends: Male NPT threaded both ends
• ✅ Service Use: Suitable for low- to medium-pressure mechanical systems

Installation Guidelines

Install using thread sealant or PTFE tape to prevent leakage at the joint. Threads must be clean and properly engaged to ensure a tight mechanical seal. Torque should be applied evenly using a pipe wrench or equivalent tool. This nipple is not approved for potable water systems due to the lack of internal corrosion protection. Follow all applicable codes when installing in fuel gas systems or pressure-rated piping networks.

Typical Applications

Commonly used in industrial and commercial piping for natural gas, propane, compressed air, low-pressure steam, and oil-based systems. Its small diameter and moderate length make it suitable for regulator connections, manifold tie-ins, and equipment piping in mechanical rooms.

Performance and Compliance

• Pressure Rating: Dependent on pipe schedule and service conditions
• Thread Standard: ANSI/ASME B1.20.1 NPT
• Conformance: Manufactured to applicable ASTM and ANSI standards for black steel fittings

Regulatory Note

This black steel nipple is intended for non-potable systems and is not rated for use in domestic water lines. Always verify local code requirements and installation guidelines prior to use in gas or mechanical service.

The 1/4" x 4-1/2" Black Steel Nipple provides a reliable, rigid connection between threaded pipe components in low- to medium-pressure systems. Its dimensional precision and durable construction make it a dependable choice for industrial, mechanical, and utility-grade piping applications.