Airtac PC Threaded Straight Connector PC402-S
SUS304 stainless variant (-S)The AirTAC Airtac PC Threaded Straight Connector PC402-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 PC402-S
The PC402-S is AirTAC's PC male connector in the SUS304 stainless version, made to push a Dia 4 mm soft nylon or polyurethane tube straight into a 1/4 in PT male thread. To connect, press the tube firmly into the chuck until it stops; the stainless spring gasket and grip ring hold it under pressure, and pushing the POM release ring down frees the tube again. On this variant the connector body itself is stainless steel 304 and the whole part is copper-free - unlike the -S versions of the elbow and tee families, where only the stud is stainless. The 1/4 in thread arrives with sealant already applied, so it seals into the port without extra tape.
The ratings are the standard resin-profile figures and are unchanged by the stainless body: working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum to -750 mmHg (10 Torr), proof pressure 1.5 MPa, and a temperature window of -20 to +70 C. Dia 4 is the smallest tube size AirTAC makes on the PC ladder, and the 1/4 in thread supports every PC tube size from 4 to 12 mm, which makes this pairing the fine-control end of a large-port manifold.
Airtac PC Threaded Straight Connector PC402-S Technical Specifications
| Model | Airtac PC Threaded Straight Connector PC402-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 PC402-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 PC402-S Is Used
Analytical instrument carrier-air lines
Sample and carrier-air runs on chromatographs and environmental analysers use 4 mm PU tube at low pressure; the 1/4 in PT thread drops straight onto the instrument's standard port while the SUS304 body keeps corrosion out of a precision circuit.
Wash-down proximity sensing on food machinery
Air feed to a small proximity sensor or jet nozzle on a rinsing or filling machine, where daily caustic hose-down would pit a brass fitting; the stainless body shrugs it off within the -20 to +70 C window.
Copper-free purge lines in electronics manufacturing
Instrument-air purges around plating baths and semiconductor wet benches, where copper-catalysed contamination matters; the PC402-S is copper-free through all wetted parts, a detail the standard PC402 cannot offer.
Is the Airtac PC Threaded Straight Connector PC402-S the Right Part?
Dia 4 mm is the bottom of the PC range, so there is no size below it: the only step available is up to Dia 6 in the PC602-S, which gains flow capacity and stiffness at the cost of a larger bend radius on the tube. If the port is 1/8 in PT rather than 1/4 in, the PC401-S covers the same Dia 4 tube on the smaller thread. Whichever you choose, the tube OD must match the fitting exactly - a Dia 4 chuck will not grip 3 mm or 1/4 in (6.35 mm) tube, and forcing it will leak or blow off. Choose the solid-stainless PC straight connector over the PBT-body elbows when the line runs through wash-down splash, salt-laden air, or a process where copper ions would contaminate the medium.
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 PC402-S FAQ
It is a stainless SUS304 one-touch male connector for Dia 4 mm soft nylon or polyurethane tube with a 1/4 in PT male thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), vacuum capability is -750 mmHg (10 Torr), proof pressure is 1.5 MPa, and the operating temperature range is -20 to +70 C. The body is stainless steel 304 and copper-free; the release button and chuck are POM and the O-ring is NBR. Ratings are identical to the standard PC402.
No. The chuck is cut for exactly Dia 4 mm OD tube; 1/4 in (6.35 mm) tubing will not seal or hold in it. For 6 mm tube on the same 1/4 in PT thread, order the PC602-S. If your port is 1/8 in PT, the PC401-S is the Dia 4 equivalent. Note that Dia 4 is the smallest tube AirTAC offers on the PC series, so there is no step below this fitting.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard parts are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC One-Touch Fittings
Request a Quote for Airtac PC Threaded Straight Connector PC402-S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.