Airtac PC Threaded Straight Connector PC401D
The AirTAC Airtac PC Threaded Straight Connector PC401D 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 PC401D
The PC401D is an AirTAC PC series one-touch male connector, the smallest tube size in the family: Dia 4 mm soft nylon or polyurethane tubing on one side, a 1/8 in PT male thread on the other. Push the tube fully home and the stainless spring gasket and chuck set grip it against a NBR O-ring; press the release ring to free it again. The PC body is brass, and on this series the D suffix changes the release button to black while leaving the body grey.
It belongs to the resin/brass spec profile, so it carries the full 0-1.0 MPa (0-10 kgf/cm2) working pressure with -750 mmHg (10 Torr) vacuum capability, a 1.5 MPa proof pressure and a -20 to +70 C service range. Unlike the M5 sizes in this catalogue, the 1/8 in thread arrives with sealant already applied, so it goes straight onto a PT-tapped port without extra tape or dope.
Airtac PC Threaded Straight Connector PC401D Technical Specifications
| Model | Airtac PC Threaded Straight Connector PC401D |
|---|---|
| Type | Male connector |
| Series | PC |
| 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 PC Threaded Straight Connector PC401D
| 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. |
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 PC401D Is Used
Pilot signal to a compact gripper
Runs a Dia 4 mm pilot line from a valve manifold to the small pilot port of a compact pneumatic gripper, where a large-bore fitting would be oversized for the signal flow.
Pressure sensor take-off on a packaging machine
Feeds a Dia 4 mm sensing line to a pressure switch or transducer on a cartoning machine, giving a tidy removable connection at the sensor thread.
Test-bench and lab rig plumbing
Suits pneumatic test benches and laboratory rigs built from Dia 4 mm polyurethane tubing, where frequent re-plumbing makes the push-in release ring more practical than barbed or compression joints.
Is the Airtac PC Threaded Straight Connector PC401D the Right Part?
Dia 4 mm is the bottom rung of the PC ladder on a 1/8 in thread - there is no smaller tube below it. Stepping up one size gives the PC601 (Dia 6 tube, same 1/8 in thread), which buys more effective bore and lower restriction for the same port. If your port is 1/4 in instead, PC402 keeps the Dia 4 tube on the bigger thread. Whatever you order, the fitting bore must match the tube OD exactly: a Dia 4 chuck will not reliably hold 5 mm or 1/4 in tube, and oversize tube is the usual cause of a push-in joint blowing off under pressure.
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 PC401D FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure down to -750 mmHg (10 Torr), proof pressure 1.5 MPa, operating temperature -20 to +70 C. The tube side accepts Dia 4 mm soft nylon or polyurethane tubing and the thread is a 1/8 in PT male. It is a resin/brass one-touch part: brass body with a POM release button and chuck, aluminium-alloy guide, stainless spring gasket and NBR O-ring.
No tape is needed: AirTAC ships threaded one-touch sizes with sealant already applied to the thread, so the PC401D can be screwed directly into a 1/8 in PT port. The D suffix on the PC series changes only the release button to black - the body stays grey and the pressure, temperature and vacuum figures are identical to the plain PC401.
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.
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