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Small brass push-fit adapter with silver finish, straight shape, quarter inch tube size

Legris

Legris 3171 56 20 Push-Fit Adapter 1/4 in Brass 10

SKU CH-Z8BY-H4Y48 MPN 3171

Push-fit brass adapter connects 1/4 inch tube to #10-32 thread, rated 290 psi and 175 Degrees F, pack of 10

  • TypeDrain Components
  • MaterialMetal
  • Push-to-connect design speeds vacuum line assembly
  • Brass construction resists corrosion up to 290 psi
  • #10-32 UNF thread mates with standard ports
  • Rated to 175 °F for demanding environments
  • Pack of 10 fittings covers multiple connections

Push-Fit Adapter for Vacuum Lines

The Legris 3171 56 20 is a straight push-fit adapter designed for vacuum applications. It connects 1/4 in tubing to a #10-32 MUNF thread using a brass body. The fitting suits technicians and engineers who need a compact, tool-free connection in pneumatic or vacuum circuits. Buyers requiring a different thread form or larger tube diameter should select another model.

Brass Construction Handles 290 psi at 175 Degrees F

Brass material provides corrosion resistance and mechanical strength for the rated limits. The adapter withstands a maximum operating pressure of 290 psi and a maximum operating temperature of 175 Degrees F. Its 21/32 in overall length keeps the profile short inside cabinets or panels. No pre-applied thread sealant is included, so the installer must apply a compatible compound if the MUNF port requires sealing.

Push-to-Connect Reliability Under Continuous Vacuum

The push-to-connect end grips the 1/4 in tube securely without tools, maintaining seal integrity during sustained vacuum operation. Brass threads resist galling during repeated assembly and disassembly cycles. The straight shape avoids flow restriction that elbows introduce, supporting stable system performance over long duty periods. The pack contains 10 adapters for multi-point installations or spares.

Highlights

  • Push-to-connect design speeds vacuum line assembly
  • Brass construction resists corrosion up to 290 psi
  • #10-32 UNF thread mates with standard ports
  • Rated to 175 °F for demanding environments
  • Pack of 10 fittings covers multiple connections

Specifications

TypeDrain Components
MaterialMetal
BrandLegris
Model3171 56 20

Questions about this item

How do I install the Legris 3171 56 20 push-fit adapter without damaging the 1/4 in tube connection?

Push the 1/4 in tube firmly into the Side A push-to-connect port until it seats fully; then thread the #10-32 UNF Side B into the mating port using a wrench on the brass hex, avoiding over-tightening which can strip the fine threads.

What maintenance will the brass adapter need after prolonged use in a vacuum system?

Inspect the brass body and #10-32 threads for corrosion or sealant degradation; replace the fitting if the push-to-connect grip ring shows wear or if leaks appear at either the tube or threaded connection.

At what pressure limit does the 3171 56 20 adapter become unsafe during sustained operation?

The maximum operating pressure is 290 psi; sustained use at or above this rating risks fitting failure or tube blow-off, so keep system pressure below that limit.

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