Male Threads: Types and Uses in Plumbing

What Is a Male Thread?

A male thread is an externally threaded component designed to screw into a corresponding female thread (internal thread). Male threads are commonly used in industrial plumbing, gas, oil, and water systems to create NPT, BSP, and metric threads for high-pressure and corrosion-resistant male threaded applications.

Key Features:

• Connect other female thread pipes or fittings through their male threads
• The wide variety includes pipe nipples (short pipes with male threads on both ends), hex nipples, plugs, street elbows, male adapters, and more.
• Materials: stainless steel or carbon steel

Critical Industries

• Oil and gas
• Chemical processing
• HVAC systems

Parallel Thread vs. Tapered Thread

Parallel Threads (e.g., BSPP)

• Design: Consistent diameter across the thread.
• Applications: Low-pressure systems requiring gaskets or seals.
• Pros: Easy assembly, reusable.

Tapered Threads (e.g., NPT, BSPT)

• Design: Diameter decreases toward the end.
• Applications: High-pressure systems (self-sealing via thread deformation).
• Pros: Leak-resistant without additional sealants.

How to Select the Right Male Plumbing Fittings

• Pressure Requirements: Tapered threads for systems exceeding 1,000 PSI.
• Material Compatibility: Stainless steel for corrosive environments.
• Thread Standards: Match regional norms (e.g., NPT in North America).