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Steel quick-connect coupler with zinc finish and 3/8 NPT female thread

SPEEDAIRE

SPEEDAIRE 30E682 Coupler Body 3/8 NPT Steel

SKU CH-YEPV-ZRNTM

A 3/8-inch NPT steel quick-connect coupler body rated for 300 psi at 70°F with a 1274.26 L/min flow rate

  • Quick-connect design enables tool-free hose changes
  • Sleeve locking mechanism secures the connection during use
  • Steel body with zinc-plated finish resists corrosion
  • Rated for 300 psi maximum working pressure at 70°F
  • Operates reliably from -40°F to 150°F

3/8 NPT steel quick-connect coupler

The SPEEDAIRE 30E682 is a 3/8 inch NPT coupler body built for compressed-air lines in industrial and automotive workshops. Its steel construction with zinc plating and nitrile seals handles 300 psi at 70°F and operates from -40°F to 150°F. The integrated poppet valve and sleeve lock allow tool-free connection to industrial interchange plugs. It suits installers who need a durable, high-flow fitting for permanent or semi-permanent air supply points.

Thread-in installation with standard sealant

The fitting uses a 3/8"-18 NPT female thread, so it screws directly onto a matching male pipe thread using PTFE tape or pipe dope for a leak-free seal. No special tools are required beyond a wrench on the hex body. Over-tightening can distort the thread or crack the zinc coating, and debris in the port will prevent the poppet from seating fully. Ensure the mating plug is an industrial interchange type; other profiles will not lock or seal correctly.

Verify thread size, pressure and media compatibility

Confirm the supply line has a 3/8"-18 NPT male thread and that system pressure never exceeds 300 psi at 70°F. Check that the working temperature stays within -40°F to 150°F and that the compressed air or fluid is compatible with nitrile seals and zinc-plated steel. The coupler flows up to 1,274.26 liters per minute, so size upstream regulators and filters accordingly. Buyers needing a different thread standard, higher pressure rating or non-industrial plug profile should select another fitting.

Highlights

  • Quick-connect design enables tool-free hose changes
  • Sleeve locking mechanism secures the connection during use
  • Steel body with zinc-plated finish resists corrosion
  • Rated for 300 psi maximum working pressure at 70°F
  • Operates reliably from -40°F to 150°F

Specifications

BrandSPEEDAIRE

Questions about this item

How can I verify the SPEEDAIRE 30E682 coupler body is sealing correctly after installation?

Pressurise the line to its 300 psi rating at 70°F and check the nitrile-sealed connection for audible leaks or pressure drop; the integrated poppet valve should open only when a compatible industrial-interchange plug is fully seated.

What comes with the SPEEDAIRE 30E682 and what must I supply separately?

The box contains the steel, zinc-plated 3/8"-18 NPT female coupler body with its sleeve locking mechanism and poppet valve; you must provide a matching 3/8 in industrial-interchange plug and any thread sealant or hose required for your air line.

Which version of the SPEEDAIRE 30E682 should I choose for a 3/8 in NPT air line rated to 300 psi?

The single listed model 30E682 is a 3/8 in body with 3/8"-18 NPT female threads, steel construction, nitrile seals and a 300 psi / 1274.26 L/min rating — select it when those exact specifications match your system.

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