Airtac POC Round Thread Straight Connector POC401D
The AirTAC Airtac POC Round Thread Straight Connector POC401D 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 POC401D
The POC401D is AirTAC's compact one-touch male connector in the smallest tube size of its range: it joins Dia 4 mm soft nylon or polyurethane tubing to a 1/8 in PT male thread. POC is the shortened-body version of the PC connector, so it sits closer to the port when space behind the fitting is tight. The D suffix on POC changes the release button only - the body stays standard grey, and every dimension and rating matches the grey POC401.
Connection is push-in: square-cut the tube, push it home until it bottoms, and the stainless spring gasket and chuck jaws grip it against pressure; press the POM release ring and the tube frees. This is the resin/brass profile, rated 0-1.0 MPa working pressure, -750 mmHg vacuum, 1.5 MPa proof pressure, and -20 to +70 C. The threaded stud arrives with sealant applied, so it seals straight into the port without extra tape.
Airtac POC Round Thread Straight Connector POC401D Technical Specifications
| Model | Airtac POC Round Thread Straight Connector POC401D |
|---|---|
| Type | Male connector (compact) |
| Series | POC |
| Connection | Push-in one-touch |
| 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. 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 POC401D
| 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. |
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 POC401D Is Used
Pneumatic signal lines on lab analysers
Dia 4 mm tubing and a low-profile body keep pilot and sensor signals routed cleanly inside compact analytical instruments, where a full-size connector would foul the housing.
Pick-and-place heads on packaging machines
The shortened POC body tucks against the tooling plate on small vacuum and ejector circuits, leaving clearance for tube bending in tight end-of-arm layouts.
Junction blocks on electronics test rigs
A single 1/8 in PT port on a manifold block feeds one 4 mm drop line per station, letting each test position be plumbed and replaced without disturbing the manifold.
Is the Airtac POC Round Thread Straight Connector POC401D the Right Part?
Dia 4 is the bottom of the POC ladder on a 1/8 in thread - there is no smaller tube below it, so this is the part to specify for the finest signal and pilot lines. The next step up is POC601 (Dia 6), which suits heavier actuation; the larger bore also accepts a slightly higher flow through the same 1/8 in stud. Note that POC 1/8 in tops out at Dia 10, while the full-size PC 1/8 in reaches Dia 12 - if you later need the bigger tube on the same thread, the body series changes too.
Tube OD must match exactly: a Dia 4 chuck will not seal on 5/32 in or 3 mm tube. Check the port depth before ordering - the compact body helps, but the 1/8 in stud still needs its full engagement.
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 POC401D FAQ
It is a compact one-touch male connector joining Dia 4 mm tube to a 1/8 in PT male thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), negative pressure -750 mmHg (10 Torr), proof pressure 1.5 MPa, and temperature range -20 to +70 C. It runs on soft nylon or polyurethane tubing, and the D suffix gives a black release button with standard grey body.
No. The chuck and gasket in the POC401D are cut for Dia 4 mm tube only and will not grip 1/4 in (6 mm) or any other OD. Order POC601 for Dia 6 mm on the same 1/8 in thread, or match the fitting to the exact tube size printed on the tubing. For 1/4 in tube, look at POC402 in the same series.
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