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Small stainless steel reducing hex coupling with female NPT threads on both ends

Zoro Select

Zoro Select 7806 Reducing Hex Coupling 304 Stainless Steel Female NPT 1/4 1/8 6100 psi

SKU CH-WWWA-ZNP83

A 304 stainless steel reducing hex coupling joining 1/4 inch and 1/8 inch female NPT threads, rated to 6100 psi for air, natural gas, oil, potable water and steam

  • Reduces pipe size from 1/4 to 1/8 NPT
  • 304 stainless steel resists corrosion in fluid lines
  • Rated to 6100 psi for high-pressure service
  • Hex wrench flats speed up installation time
  • Low-lead compliant for potable water systems

Zoro Select 7806 Reducing Hex Coupling

The Zoro Select 7806 is a 304 stainless steel reducing hex coupling built for instrumentation piping. It connects 1/4 inch female NPT on one side to 1/8 inch female NPT on the other. The fitting suits installers who need a compact, corrosion-resistant transition between different pipe sizes. It meets low lead requirements for potable water systems.

Pressure-tight performance at 6100 psi

Rated for 6100 psi, the coupling maintains seal integrity under sustained high pressure with air, natural gas, oil, potable water or steam. Its 304 stainless construction resists corrosion during continuous exposure to these media. The ANSI B31.1 compliance confirms the design produces reliable pressure-tight joints when correctly assembled. The 3/4 inch hex allows secure wrench engagement for proper installation torque.

1/4 to 1/8 inch NPT step-down

The defining specification is the reduction from 1/4 inch NPT (18 TPI) to 1/8 inch NPT (27 TPI) within a 15/16 inch overall length. This exact thread combination determines whether the fitting matches the piping system. Buyers needing a straight coupling, a larger reduction or a different thread standard must select another part.

Highlights

  • Reduces pipe size from 1/4 to 1/8 NPT
  • 304 stainless steel resists corrosion in fluid lines
  • Rated to 6100 psi for high-pressure service
  • Hex wrench flats speed up installation time
  • Low-lead compliant for potable water systems

Specifications

BrandZORO SELECT

Questions about this item

Will the 6,100 psi rating hold without leaks or heat build-up during continuous steam service?

The 304 stainless steel reducing hex coupling is rated to 6,100 psi and meets ANSI B31.1 for pressure-tight joints in steam, air, natural gas, oil and potable water when installed correctly.

What thread sealant or tape is required for the 1/4 in 18 TPI and 1/8 in 27 TPI female NPT ends?

Both ends use standard female NPT threads; apply PTFE tape or pipe thread sealant rated for the system pressure and media to ensure a leak-free joint.

Can this reducing hex coupling join a legacy 1/8 in NPT brass instrument to a newer 1/4 in NPT stainless line?

Yes — the coupling reduces from 1/4 in NPT on Side A to 1/8 in NPT on Side B, and 304 stainless steel is compatible with brass in most non-corrosive services.

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