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Small silver stainless steel coupler with female thread and push-to-connect sleeve

SPEEDAIRE

SPEEDAIRE 30E540 Coupler Body 3/8 304 SS

SKU CH-R72Q-SPTED

304 stainless steel quick-connect coupler with push-to-connect locking and poppet valve, rated 400 psi at 70°F for pneumatic or hydraulic lines

  • 304 stainless steel resists corrosion in tough environments
  • Push-to-connect locking enables rapid tool-free hose changes
  • Poppet valve regulates flow automatically during connection
  • Female 1/2"-14 NPT thread fits standard supply lines
  • Rated 400 psi at 70°F for demanding pneumatic and hydraulic use

SPEEDAIRE 30E540 Coupler Body 3/8 304 SS

The SPEEDAIRE 30E540 is a quick-connect hose coupling built for the end of hose or air supply lines. It enables rapid, tool-free connection and disconnection using a push-to-connect locking mechanism. Constructed from 304 stainless steel with a nitrile seal, it suits pneumatic, hydraulic and general-purpose applications. The socket-style body accepts a 1/2"-14 NPT female thread for hose fitting.

Users needing 400 psi rating at 70°F

This coupler suits operators who require a poppet valve to regulate flow during connection and a 3/8 inch coupling size for 1/2 inch hose. It is not for buyers who need a different thread standard or a coupling size outside the 3/8 inch specification. The plain finish and silver colour meet basic identification needs without additional coating options.

Poppet valve regulates flow at 400 psi sustained

Under continuous load the 304 stainless body maintains its rated working pressure of 400 psi at 70°F without deformation. The nitrile seal and poppet valve combination controls media flow reliably during extended pneumatic or hydraulic cycles. California Proposition 65 warnings apply for chemical exposure during handling.

Highlights

  • 304 stainless steel resists corrosion in tough environments
  • Push-to-connect locking enables rapid tool-free hose changes
  • Poppet valve regulates flow automatically during connection
  • Female 1/2"-14 NPT thread fits standard supply lines
  • Rated 400 psi at 70°F for demanding pneumatic and hydraulic use

Specifications

BrandSPEEDAIRE

Questions about this item

What thread size must my air hose or supply line have to screw onto this 1/2"-14 NPT female coupler body?

Your hose or supply line needs a matching 1/2"-14 NPT male thread to connect to the female NPT fitting on this coupler body.

Will the 304 stainless steel body and nitrile seal hold up if I keep using my older steel fittings alongside this coupler?

The 304 stainless steel construction resists corrosion when mixed with carbon steel fittings, and the nitrile seal is rated for standard pneumatic and hydraulic fluids at the specified pressures.

How can I confirm the poppet valve is sealing correctly after I install the coupler?

Pressurize the line to the 400 psi rating at 70°F; the poppet valve should hold pressure without leakage and open smoothly when a mating plug is inserted.

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