Reliable, leak-free 1/4″ connections for air and fluid lines. The Foster SL3703 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: SL3703
- Interchange: 1/4″ Industrial
- Body: 1/4″ Coupler
- Thread: 3/8″ Hose ID
- 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: -40°F to +250°F
- Seal: Buna-N (Nitrile)
- Quantity: 1pc
- Origin: Made in USA
Why this coupler
- Automatic push-to-connect — which means single-handed connection with no sleeve retraction, for faster cycle times.
- Sleeve Lock (SL) — which means the sleeve locks after connection to guard against accidental disconnect.
- 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.
Is this push-to-connect?
Yes — insert the plug and it connects automatically with no sleeve retraction.
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.
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