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Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic

Foster 3603S, 1/4" Industrial Coupler x 1/4" Hose ID, 3 Series, Steam/EPDM, Brass/SS

by Foster
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$ 326.00
$ 326.00 - $ 326.00
$ 326.00
$ 262.00
$ 262.00 - $ 262.00
$ 262.00

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3603S is a Brass/SS 1/4" industrial coupler from the Foster 3 Series — the most popular industrial air-coupler size, interchanging with any 1/4"-body industrial-interchange half (ISO 6150-B / ANSI T3.20.14; FM 3 Series complies with A-A-59439; FM accept MIL-C-4109F plugs). Built in the USA for shop air, tools, and production lines.

Specifications

  • Brand: Foster
  • Series: 3
  • Part Number: 3603S
  • Interchange: 1/4" Industrial
  • Body: 1/4" Coupler
  • Thread: 1/4" Hose ID
  • Valve Type: One-Way Shut-Off
  • Material: Brass/SS
  • Operation: Manual pull sleeve to connect
  • Working Pressure: 300 PSIG; vacuum to 27" Hg
  • Temperature Range: -40°F to +300°F
  • Seal: Ethylene Propylene (EPDM)
  • 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.
  • Brass construction — which means corrosion resistance and smooth, reliable operation.
  • EPDM seal — which means compatibility with steam service.
  • 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 — clean airflow, 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 1/4"-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 Ethylene Propylene (EPDM) seal rated -40°F to +300°F.

Is this air coupler fuel-rated?
No — the 3 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, and production equipment. Pair this coupler with a matching 1/4" 3 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.