1/4 inch x Close Black Steel Nipple

1/4" x Close Black Steel Nipple – Built for Rugged, High-Pressure Applications

The 1/4" x Close Black Steel Nipple is designed for use in gas and hydronic systems where strength, heat tolerance, and pressure rating are paramount. With its compact profile and full-thread design, this fitting delivers dependable service in tight spaces and critical installations.

Key Features

• Material: Schedule 40 black steel for use in non-potable applications
• Connection: Male NPT (National Pipe Thread) on both ends
• Length: Close – fully threaded for maximum engagement in tight-fit assemblies
• Application: Rated for use in low-pressure steam, air, oil, and gas systems
• Compliance: Manufactured to ASTM A733 and ANSI B1.20.1 standards

Why Professionals Specify Black Steel Nipples

• High-Pressure Performance: Suitable for systems operating under elevated mechanical stress and thermal conditions
• Compact Fitment: Close nipple design eliminates excess spacing, ideal for short-run pipe transitions and couplings
• Durable Finish: Black coating provides basic corrosion resistance for indoor use
• Thread Precision: NPT threading provides reliable sealing with thread tape or compound
• Versatile Integration: Commonly used in HVAC, gas piping, air compressors, and industrial assemblies

Installation Guidelines

Ensure threads are clean and apply pipe joint compound or PTFE tape to male threads before threading into female fittings. Torque by hand initially, then complete tightening with an appropriate wrench, being careful not to overtighten and crack adjacent components. Close nipples require precise alignment due to minimal unthreaded space between joined fittings.

Typical Use Cases

This 1/4" close nipple is regularly installed in black iron gas distribution lines, compressed air systems, boiler piping, and hydraulic loops. It’s especially useful when adapting equipment ports with minimal clearance or performing sectional maintenance in steel pipe configurations.

Did You Know?

Close nipples have no unthreaded shoulder between ends, making them ideal for direct coupling between two fittings or valves without added length.

Rely on the 1/4" x Close Black Steel Nipple when jobsite conditions call for rugged construction and exact thread engagement. This fitting meets the demands of professional installations and delivers dependable results where system integrity is non-negotiable.