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Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel

Foster 4304S/S, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, 303 Stainless

by Foster
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$ 864.00
$ 864.00 - $ 864.00
$ 864.00
$ 691.00
$ 691.00 - $ 691.00
$ 691.00

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4304S/S is a 303 Stainless 3/8" industrial coupler from the Foster 4 Series — a high-flow quick coupler that interchanges with any 3/8"-body industrial-interchange half (ISO 6150-B / ANSI T3.20.14). Built in the USA for shop air, tools, and production lines that demand dependable, high-flow connect/disconnect.

Specifications

  • Brand: Foster
  • Series: 4
  • Part Number: 4304S/S
  • Interchange: 3/8" Industrial
  • Body: 3/8" Coupler
  • Thread: 3/8" Male NPT, MPT
  • Valve Type: One-Way Shut-Off
  • Material: 303 Stainless
  • Operation: Manual pull sleeve to connect
  • Working Pressure: 300 PSIG; vacuum to 27" Hg
  • Temperature Range: -40°F to +250°F
  • Seal: Buna-N (Nitrile)
  • Quantity: 1pc
  • Origin: Made in USA

Why this coupler

  • Manual pull sleeve — which means a positive, deliberate connection; retract the sleeve by hand to connect or release the plug.
  • 303 stainless construction — which means superior corrosion resistance for washdown, marine, and chemical environments.
  • One-Way Shut-Off — which means the socket seals the supply line the instant the plug is removed, holding pressure and preventing blow-down.

Snap it on and the connection just holds — full 3/8" flow, no drips, no hiss. Built to take daily shop abuse and keep sealing leak-free, connection after connection.

Frequently asked questions

What does this connect to?
It mates with any 3/8"-body industrial-interchange plug (ISO 6150-B / ANSI T3.20.14) — the most common air-coupler standard in North America.

What pressure and temperature is it rated for?
300 PSIG working pressure (vacuum to 27" Hg connected), with a Buna-N (Nitrile) seal.

Is this air coupler fuel-rated?
No — the 4 Series is an industrial air/fluid coupler for compressed air, water, and similar media; it is not rated for fuel.

Ideal for shop air lines, pneumatic tools, impact wrenches, and production equipment. Pair this coupler with a matching 3/8" 4 Series plug for a complete, leak-free connection.

Why buy from hpcouplers: Foster quality (an Ideal Tridon Group brand), backed by responsive US-based support, accurate specs, and fast shipping. Quick-coupling is what we do.