3/8 inch x 4-1/2 inch Black Steel Nipple

3/8" x 4-1/2" Black Steel Nipple – Threaded Segment for Gas and Fluid Transfer Systems

The 3/8" x 4-1/2" black steel nipple is a pre-threaded pipe segment used to connect two female-threaded black pipe components. Manufactured from welded Schedule 40 black steel pipe, this fitting is engineered for structural strength and pressure resistance in mechanical and fuel gas systems.

Commonly used for short-distance connections, spacing offsets, or extensions in natural gas, propane, and compressed air systems, this nipple conforms to applicable industry tolerances and standards for reliable installation in residential, commercial, and light industrial environments.

Product Features

• ✅ Thread Standard: NPT (National Pipe Taper), ANSI B1.20.1
• ✅ Material: Welded black steel pipe, typically conforming to ASTM A53/A or A106 standards
• ✅ Wall Thickness: Schedule 40
• ✅ Connection Ends: Male threads on both ends for compatibility with threaded iron pipe fittings
• ✅ Use Case: Suitable for gas distribution lines, compressed air systems, and non-potable water transport

Installation Requirements

Installation should follow standard threading practices using approved thread sealants such as PTFE tape or pipe joint compound rated for the service type (e.g., gas, air, or oil). Proper tightening torque must be applied to ensure a leak-resistant seal without damaging thread integrity. Always inspect threads for nicks or deformation prior to use.

Technical Specifications

• Nominal Size: 3/8 inch
• Length: 4-1/2 inches overall
• Threaded Ends: Both ends, NPT
• Operating Pressure: Pressure rating dependent on system media and temperature; typically rated for up to 150 psi gas or 300 psi air/water in compatible systems

Applications

Commonly installed in black iron piping networks for heating, natural gas, fuel oil, and low-pressure steam distribution. Frequently used in boiler rooms, HVAC mechanical rooms, and commercial appliance connections. Not approved for potable water systems unless protected or coated according to local code.

Compliance Note

Meets standard mechanical and fuel gas installation codes for black steel piping systems. Always verify local jurisdictional requirements before use in regulated applications.

The 3/8" x 4-1/2" Black Steel Nipple delivers reliable performance where precise threaded connections are required in rigid gas or air piping systems. Designed to meet professional-grade expectations for durability and code compliance.