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🍁 Fall Savings Are Here – Get Up to 30% Off Select Fittings & Hose!
🍁 Fall Savings Are Here – Get Up to 30% Off Select Fittings & Hose!
Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel

Foster FM4204H, 3/8" Industrial Coupler x 3/8" Female NPT, 4 Series, Automatic, Heat/Viton, Brass

by Foster
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$ 32.69
$ 32.69 - $ 32.69
$ 32.69
$ 26.19
$ 26.19 - $ 26.19
$ 26.19

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4204H is a Brass 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: FM4204H
  • Interchange: 3/8" Industrial
  • Body: 3/8" Coupler
  • Thread: 3/8" Female NPT, FPT
  • Valve Type: One-Way Shut-Off
  • Material: Brass
  • Operation: Automatic, push-to-connect (insert the plug; no sleeve retraction to connect)
  • Working Pressure: 300 PSIG; vacuum to 27" Hg
  • Temperature Range: -15°F to +400°F
  • Seal: Viton
  • Quantity: 1pc
  • Origin: Made in USA

Why this coupler

  • Automatic push-to-connect — which means you connect with a single-handed push, no sleeve retraction; faster cycle times on the line.
  • Brass construction — which means corrosion resistance and smooth, reliable operation.
  • Viton seal — which means reliable sealing in elevated-temperature 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 — 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 Viton seal.

Is this push-to-connect?
Yes — this is an automatic socket: insert the plug and it connects with no sleeve retraction.

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.