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

Foster SG2903, 1/4" Industrial Coupler x 1/8" Male NPT, 3 Series, Sleeve Guard, Brass

by Foster
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$ 17.69
$ 17.69 - $ 17.69
$ 17.69
$ 14.09
$ 14.09 - $ 14.09
$ 14.09

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster SG2903 is a Brass 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: SG2903
  • Interchange: 1/4" Industrial
  • Body: 1/4" Coupler
  • Thread: 1/8" Male NPT, MPT
  • Valve Type: One-Way Shut-Off
  • Material: Brass
  • Operation: Manual sleeve with Sleeve Guard (rigid flange resists accidental sleeve retraction)
  • 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

  • Sleeve Guard — which means a rigid flange shields the sleeve from accidental retraction when the hose is dragged.
  • Brass construction — which means corrosion resistance and smooth, reliable operation.
  • 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 Buna-N (Nitrile) seal rated -40°F to +250°F.

What is a Sleeve Guard?
A rigid flange at the nose of the socket that protects the sleeve from being knocked open when the hose is dragged.

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.