Airtac POC Round Thread Straight Connector POC402-S
SUS304 stainless variant (-S)The AirTAC Airtac POC Round Thread Straight Connector POC402-S is a genuine male connector (compact) for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeMale connector (compact)
- SeriesPOC
- 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 POC Round Thread Straight Connector POC402-S
The POC402-S is AirTAC's compact one-touch male connector in the SUS304 stainless variant, joining Dia 4 mm soft nylon or polyurethane tube to a 1/4 in PT male thread. On the straight POC and PC connectors the -S suffix upgrades the body itself to Stainless steel 304, and AirTAC states all parts of this variant are copper-free - a different construction from the elbow and tee fittings in the same catalogue, where only the stud is stainless. Push the tube home and the stainless spring gasket and POM chuck grip it; press the release ring to free it.
This is the resin-line pressure profile, unchanged by the stainless body: 0 to 1.0 MPa working, 1.5 MPa proof, vacuum to -750 mmHg, and -20 to +70 C. The POM release button and chuck, aluminium-alloy guide and NBR O-ring carry over from the standard POC402, and the dimension tables match the grey version exactly, so a stainless swap needs no redesign.
Airtac POC Round Thread Straight Connector POC402-S Technical Specifications
| Model | Airtac POC Round Thread Straight Connector POC402-S |
|---|---|
| Type | Male connector (compact) |
| Series | POC |
| 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 POC Round Thread Straight Connector POC402-S
| POC | Male connector (compact). |
|---|---|
| 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 POC Round Thread Straight Connector POC402-S Is Used
Plating and wet-process lines
Copper-free SUS304 on 4 mm purge and actuation legs above plating tanks, where bare brass fittings contaminate the bath chemistry and corrode at the thread.
Electronics clean-room jigs
Feeding small pick-and-place vacuum ejectors and cylinder pucks on PCB handling rigs, where the 4 mm bore suits low-volume actuation and copper particles are unacceptable.
Marine and coastal panels
A 1/4 in PT thread screwed into salt-air-exposed valve manifolds on fishing-vessel and dockside equipment, with 4 mm nylon runs to helm-mounted indicators.
Is the Airtac POC Round Thread Straight Connector POC402-S the Right Part?
Dia 4 is the smallest tube the POC ladder offers, so the only step down in the code is the thread: POC40M5-S keeps the 4 mm bore but ends in M5x0.8, which seals with a gasket rather than the sealant-coated PT thread. Stepping up to POC401-S buys a 1/8 in thread on the same small bore, and POC602-S moves the bore to Dia 6 while keeping 1/4 in. Match the thread to the port first, then confirm the tube OD is exactly 4 mm - a one-touch chuck sized for Dia 4 will not grip 5/32 in imperial tube even though the numbers look close.
If the run needs to turn a corner or pass through a panel, this straight connector is the wrong shape - look at PL for elbows or PMF for bulkhead duty rather than bending 4 mm tube tight against the body.
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 POC Round Thread Straight Connector POC402-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), operating temperature -20 to +70 C. The tube side takes Dia 4 mm soft nylon or polyurethane; the male thread is 1/4 in PT, sealant-coated, on a SUS304 copper-free body. Ratings are identical to the standard POC402 - the stainless variant changes materials, never the figures.
No. Internally the POC402-S uses the same POM chuck, stainless spring gasket and NBR O-ring as the brass-bodied POC402, and the published dimensions are identical. The difference is the SUS304 body and copper-free construction for corrosive or contamination-sensitive settings. Note that at the top of the temperature range the tubing itself, not this fitting, is usually the first limit - check the tube's rating too.
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