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Small hexagonal stainless steel coupling with female NPT threads both ends

Zoro Select

Zoro Select 2TY81 1/4 in FNPT 316 Stainless Steel Coupling Class 3000 equipment

SKU CH-K84J-3CTKV

Connects two 1/4 inch pipes inline with 316 stainless steel female NPT threads rated to 3000 psi at 100 degrees Fahrenheit and 2500 psi steam at 350 degrees Fahrenheit.

  • 316 stainless steel resists corrosion in harsh environments
  • Female NPT threads on both ends join pipes inline
  • Class 3000 rating handles 3000 psi at 100 degrees Fahrenheit
  • Steam service rated to 2500 psi at 350 degrees Fahrenheit
  • Meets ASTM-A-182, ANSI/ASME B1.20.1 and ASME B16.11 standards

1/4 in FNPT 316 Stainless Coupling

The Zoro Select 2TY81 is a 316 stainless steel coupling designed to join two pipes in a straight line. It features female NPT threads on both ends sized for 1/4 inch nominal pipe. This fitting suits industrial plumbing systems requiring corrosion-resistant connections. It is not intended for applications needing larger bore sizes or different thread standards.

Class 3000 Pressure Capacity

Rated Class 3000, the coupling handles internal pressure up to 3000 psi at 100 degrees Fahrenheit. It also withstands steam pressure up to 2500 psi at 350 degrees Fahrenheit. The 316 stainless construction conforms to ASTM-A-182 for material integrity. Systems exceeding these pressure or temperature limits will require a higher-rated fitting.

ASTM B16.11 Compliant Threads

Threads conform to ANSI/ASME B1.20.1 and the fitting meets ASME B16.11 dimensional standards. No pre-applied thread sealant is included, so installers must supply compatible tape or compound. The California Proposition 65 notice indicates the presence of listed chemicals. Buyers needing a sealed or lubricated thread out of the box must prepare accordingly.

How it compares

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Price $5.99
Cheaper than about 95% of the 1,087 comparable items (median $57.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

Will the 1/4 in FNPT threads on this coupling match the ANSI/ASME B1.20.1 threads on my existing 316 stainless pipe?

Yes, both ends are cut to ANSI/ASME B1.20.1 so they will engage your existing 316 stainless pipe without mismatch.

After installation, how can I verify the joint is holding its rated pressure?

Pressurise the system to the working pressure, then inspect each thread junction for leaks; a tight joint shows no weeping at 3000 psi / 100 °F or 2500 psi steam / 350 °F.

Does the fitting come with thread sealant or must I supply it?

No sealant is applied at the factory, so you will need PTFE tape or pipe dope compatible with 316 stainless steel.

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