Airtac PC Threaded Straight Connector PC401-S
SUS304 stainless variant (-S)The AirTAC Airtac PC Threaded Straight Connector PC401-S is a genuine male connector for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeMale connector
- SeriesPC
- Working pressure0 - 1.0 MPa (0 - 10 kgf/cm2)
- Proof pressure1.5 MPa
- Temperature-20 to +70 °C
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac PC Threaded Straight Connector PC401-S
The PC401-S is AirTAC's SUS304 stainless version of the PC one-touch male connector, the straight fitting that joins a Dia 4 mm soft nylon or polyurethane tube to a 1/8 inch PT male thread. On this -S variant the fitting body itself is machined from stainless steel 304, and AirTAC states that all parts are copper-free - the POM release button and chuck, aluminium-alloy guide, stainless spring gasket and NBR O-ring stay as on the brass version.
Connection is genuinely one-touch: push the 4 mm tube fully home and the internal chuck grips it under the stainless spring gasket; press the release ring to free it. The spec is the standard resin-line profile, unchanged by stainless: 0 to 1.0 MPa working pressure, 1.5 MPa proof pressure, -750 mmHg (10 Torr) vacuum and -20 to +70 C. The thread arrives with sealant applied, ready to wind straight into the port.
Airtac PC Threaded Straight Connector PC401-S Technical Specifications
| Model | Airtac PC Threaded Straight Connector PC401-S |
|---|---|
| Type | Male connector |
| Series | PC |
| Connection | Push-in one-touch |
| Body material | Stainless steel 304 (-S variant) |
| Working pressure | 0 - 1.0 MPa (0 - 10 kgf/cm2) |
|---|---|
| Negative pressure | -750 mmHg (10 Torr) |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Applicable tubing | Soft nylon or polyurethane tube |
| Thread standard | PT (Rc tapered) unless the code says otherwise |
POM release button and chuck, aluminium-alloy guide, stainless spring gasket, NBR O-ring; body brass or PBT depending on the part. Stainless (-S): SUS304 in place of brass - a solid SUS304 body on the PC and POC straight connectors, and a PBT body with a SUS304 stud on the elbow, tee and branch shapes. Working pressure, proof pressure and temperature are unchanged from the standard version. AirTAC publishes flow as a characteristic curve rather than a single figure, so no L/min value is listed.
Model Code: Airtac PC Threaded Straight Connector PC401-S
| PC | Male connector. |
|---|---|
| 4 / 6 / 8 / 10 / 12 | Tube outside diameter in mm (3.2 mm exists on the mini series). |
| M5 / 01 / 02 / 03 / 04 | Thread: M5x0.8, 1/8", 1/4", 3/8", 1/2" (M3 on the mini series). |
| D | Black. Blank = grey. |
| -S | Stainless-steel body. |
Fitting & Sealing Notes
- check Cut the tube square and clean before pushing it home, or the seal will leak.
- check Push until it stops, then pull back to check the chuck has gripped.
- check To release, press the collet ring fully in and pull the tube out.
- check Threaded parts arrive with sealant on the thread; M5 sizes use a sealing gasket.
- check Match the tube OD exactly - a 6 mm fitting will not hold 1/4" tube.
Where the Airtac PC Threaded Straight Connector PC401-S Is Used
Plating-line rinse stations
Copper-free SUS304 construction keeps wetted metal free of copper ions that catalyse bath contamination, while the 1/8in PT stud threads directly into rinse-air lances.
Food machinery wash-down zones
On filling and rinsing units, the stainless body resists caustic wash-down splash that pits brass, feeding Dia 4mm tube to sensor blocks and small purge nozzles.
Electronics test-bench air drops
Copper-free wetted parts suit component handling benches; the compact Dia 4mm bore feeds low-flow pickups and vacuum pad supply lines without oversizing the tubing run.
Is the Airtac PC Threaded Straight Connector PC401-S the Right Part?
Within the 1/8 inch thread ladder on the PC series, Dia 4 is the smallest standard tube and the next step up is Dia 6 (PC601-S), which suits longer or higher-consumption branches. The only smaller size AirTAC makes is Dia 3.2, and it exists solely on the PC -M mini series, so if you need 3.2 mm you must move to that sub-family, not this one. Thread-wise, PC4M5-S covers the M5 port option at the same 4 mm tube. Tube OD must match exactly - the Dia 4 chuck will not seal on 1/4 inch (6.35 mm) imperial tube.
Choose this -S over the brass PC401 where the fitting body itself sees corrosive splash or condensate, or where copper-free wetted parts matter to your process.
Quick checklist
- ✓ Tube outside diameter matches exactly
- ✓ Thread size and standard match the port
- ✓ Working pressure within 0 - 1.0 MPa (0 - 10 kgf/cm2)
- ✓ Temperature within -20 to +70 °C
Airtac PC Threaded Straight Connector PC401-S FAQ
Working pressure 0 to 1.0 MPa (0 to 10 kgf/cm2), proof pressure 1.5 MPa, vacuum to -750 mmHg (10 Torr), temperature -20 to +70 C, tube Dia 4 mm, thread 1/8 inch PT. The -S suffix means the connector body is SUS304 stainless steel 304 and all parts are copper-free; the release button and chuck are POM, the O-ring NBR. These ratings are identical to the brass PC401 - stainless does not change them.
No, and no. On PC-series -S parts the body is SUS304 while the release button, chuck and guide keep their standard materials, and AirTAC's dimension tables match the brass version exactly, so your panel drilling and tube routing do not change. Note that at high temperature the limiting factor is usually the tube itself - soft nylon and polyurethane rarely tolerate what a metal fitting can, so keep duty within -20 to +70 C for this resin-line profile.
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