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Male NPT Adapter
The 304 Stainless Steel Male NPT Adapter is designed to transition from press-fit or other connection types to female-threaded NPT components in industrial piping systems. Contractors use this adapter to integrate threaded valves, gauges, or pipe sections into AP Stainless systems. With a corrosion-resistant stainless steel body and precision-machined threads, it ensures a secure, leak-free connection in demanding environments. Installation is quick and flameless—simply thread the male end into a compatible fitting using standard tools and sealant. Ideal for water, steam, air, and chemical applications, this adapter simplifies system integration and supports long-term performance.

Key Advantages
- Reliable Design: Proven technology with a simple and robust connection for dependable, long-term performance.
- Efficient Installation: AP Stainless is a flameless, clean system that reduces installation and repair time—cutting traditional costs by over 50%.
- Dynamic Stability: Elastomeric connections absorb vibration, thermal expansion, and contraction, enhancing system resilience.
- Superior Corrosion Resistance: Chromium dioxide layer protects against harsh environments and chemical exposure.
- Fluid Safety: No risk of contamination to conveyed fluids.
- UV Resistant: No degradation from UV exposure.
- Low Expansion Factor: With an expansion factor of only 16, the system maintains dimensional stability under thermal stress.
Specifications
- Sizes Available: ½” to 3″
- Includes: (1) Union Connectors
Material & Seals
- Material: 304 Stainless Steel
- Seals:
- EPDM (standard for press connections)
- FKM (for high temperature and chemical resistance)
Applications
- Compressed Air & Inert Gases: Ideal for corrosive environments and food service operations
- Chemical Processing: Excellent corrosion resistance
- Cooling Systems: Coolers, cooling towers, and chillers (glycol)
- Process Water Systems
- Industrial Oils: Including cutting fluids
- Power Generation Facilities
Certifications
- ASME B31.1 – Power Piping
- ASME B31.3 – Process Piping
- ASME B31.9 – Building Services Piping
- ASTM A312 – Seamless and Welded Austenitic Stainless Steel Pipes
- ISO 8573-1 – Compressed Air Quality Standards
Warranty
Backed by a 10-year warranty, all AP Stainless fittings offer peace of mind and proven durability.

Additional information
Weight
0.12 lbs
Pipe to Male NPT Adapter
16mm (1/2″) Pipe to (1/2″) Male NPT, 16mm (1/2″) Pipe to (3/4″) Male NPT, 20mm (3/4") Pipe to (1/2") Male NPT, 20mm (3/4") Pipe to (3/4") Male NPT, 20mm (3/4") Pipe to (1") Male NPT, 25mm (1") Pipe to (1/2") Male NPT, 25mm (1") Pipe to (3/4") Male NPT, 25mm (1") Pipe to (1") Male NPT, 25mm (1") Pipe to (1-1/4") Male NPT, 32mm (1 1/4″) Pipe to (1″) Male NPT, 32mm (1 1/4″) Pipe to (1 1/4″) Male NPT, 32mm (1 1/4″) Pipe to (1 1/2″) Male NPT, 40mm (1-1/2") Pipe to (1-1/4") Male NPT, 40mm (1-1/2") Pipe to (1-1/2") Male NPT, 50mm (2") Pipe to (1-1/2") Male NPT, 50mm (2") Pipe to (2") Male NPT, 63mm (2-1/2") Pipe to (2-1/2") Male NPT, 80mm (3") Pipe to (2-1/2") Male NPT
Color
Blue, Silver Metallic
Features
High Flow
Pressure
188 PSI, 1mbar/0.03inhg (Full industrial vacuum), 200 PSI
Connection
Press, Threaded
Temperature
EPDM -4°F to +248°F
Material
Stainless Steel
AP Stainless Certification
ASME, CE, EN, ISO 14001, ISO 45001, ISO 9001, TS, TUV, UL, ASME B31.1 – Power Piping, ASME B31.3 – Process Piping, ASME B31.9 – Building Services Piping, ASTM A312 – Seamless and Welded Austenitic Stainless Steel Pipes, ISO 8573-1 – Compressed Air Quality Standards