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Small hexagonal stainless steel coupling with internal threads on both ends

Zoro Select

Zoro Select 2UA49 304 Stainless Steel Female NPT Coupling 1/4 in Class 3000

SKU CH-CXXV-34AMN

Connects two 1/4-inch pipes in-line with female NPT threads, 304 stainless steel rated 3000 psi at 100°F

  • 304 stainless steel resists corrosion in harsh environments
  • Female NPT threads at 18 TPI create secure pipe connections
  • Rated 3000 psi at 100°F for high-pressure systems
  • Steam rated 2500 psi at 350°F for thermal applications
  • Meets ASTM-A-182, ANSI/ASME B1.20.1 and ASME B16.11 standards

Industrial 1/4-Inch Coupling

The Zoro Select 2UA49 is a 304 stainless steel coupling that joins two 1/4-inch pipes or tubes in-line using female NPT threads on both ends. It carries a 3000 psi rating at 100°F and a 2500 psi steam rating at 350°F, meeting ASTM-A-182, ANSI/ASME B1.20.1 and ASME B16.11 standards. The 18 TPI thread pitch ensures a secure seal for high-pressure fluid or gas lines.

Suited for High-Pressure Piping

This coupling fits installers who need a Class 3000 rated connection in 304 stainless steel for water, oil, air or steam systems up to the stated pressure and temperature limits. It is not intended for larger pipe sizes, different thread standards or applications that exceed the 3000 psi or 350°F boundaries. Buyers requiring welded, flanged or compression-style joints should select an alternative fitting type.

In-Line Build Component

The part threads directly onto male NPT nipples, valves or adapters to extend or redirect a pipeline without welding. Its 304 stainless construction resists corrosion in harsh environments and eliminates the need for additional sealing compounds when paired with compatible tape or paste. The compact in-line design keeps the assembly short, freeing space in tight equipment cabinets or machinery frames.

Highlights

  • 304 stainless steel resists corrosion in harsh environments
  • Female NPT threads at 18 TPI create secure pipe connections
  • Rated 3000 psi at 100°F for high-pressure systems
  • Steam rated 2500 psi at 350°F for thermal applications
  • Meets ASTM-A-182, ANSI/ASME B1.20.1 and ASME B16.11 standards

Specifications

BrandZORO SELECT

Questions about this item

What size male NPT pipe nipples do I need to thread into this 1/4-inch female coupling?

You need 1/4-inch nominal male NPT nipples with 18 TPI threads to match both ends of this Class 3000 fitting.

Can I join this 304 stainless coupling to older carbon-steel pipe without galvanic corrosion?

Direct contact between 304 stainless and carbon steel can accelerate corrosion; use a dielectric union or apply thread sealant rated for dissimilar metals.

How do I confirm the joint holds its 3000 psi rating after assembly?

Pressurise the system with water to 1.5 times the working pressure and inspect both female NPT threads for leaks before returning to service.

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