Airtac PC Threaded Straight Connector PC401-M
The AirTAC Airtac PC Threaded Straight Connector PC401-M 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-M
The PC401-M is the mini-series PC male connector, the smallest straight one-touch fitting AirTAC makes in this family. It joins a Dia 4 mm tube to a 1/8in male thread in a body barely larger than the tube itself, which is exactly why it exists: full-size connectors will not fit between the ports of a compact valve manifold or a miniature cylinder head. The thread is PT taper, and the male thread arrives with sealant already applied, so you thread it in and it seals without extra tape.
This is a resin-line fitting, not the metal BPC family: working pressure 0-1.0 MPa, vacuum down to -750 mmHg, proof pressure 1.5 MPa, and a temperature window of -20 to +70 C. To make the joint you push the soft nylon or polyurethane tube straight home until it bottoms out; the stainless spring gasket and POM chuck grip the OD, and pressing the grey release button down against the aluminium guide frees the tube again. The body is brass, the chuck and button are POM, and the seal is an NBR O-ring.
Airtac PC Threaded Straight Connector PC401-M Technical Specifications
| Model | Airtac PC Threaded Straight Connector PC401-M |
|---|---|
| Type | Male connector |
| Series | PC |
| Connection | Push-in one-touch |
| Size class | Mini series (-M) |
| 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 PC401-M
| 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. |
| -M | Mini series. |
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-M Is Used
Compact gripper lines on pick-and-place heads
Miniature parallel grippers and small pneumatic slides often expose a 1/8in port buried between body and rail. A straight full-size connector fouls the return stroke; the short PC401-M body clears the envelope while feeding Dia 4 tube down the moving arm.
Analytical and lab instrument actuation
Autosampler valves, purge gates and small diaphragm pumps in analytical instruments run on 4 mm polyurethane lines at low pressure. The brass body and NBR seals are indifferent to the light duty cycle, and the mini footprint fits the crowded internal manifold of a benchtop enclosure.
Manifold outlet drops on compact valve islands
Small valve islands with 1/8in outlet ports have little pitch between stations. A PC401-M on each outlet starts the Dia 4 drop to a sensor-actuator cylinder without the fittings touching each other, and the pre-applied thread sealant speeds panel assembly.
Is the Airtac PC Threaded Straight Connector PC401-M the Right Part?
Dia 4 is the floor of the standard ladder, so there is nothing below it in the normal range - the only smaller option is the Dia 3.2 size, which AirTAC makes for the PC and PL mini series alone. Step up and the PC601 takes Dia 6 tube on the same 1/8in thread, giving you roughly fifty percent more bore for flow-hungry legs; the mini 1/8in thread itself is the smallest thread available, since only M5 is smaller and M5 on the PC line carries Dia 4 or Dia 6 tube. Check the two ladder ends before you order: the thread must match the receiving port exactly, and the tube OD must match exactly, because a Dia 4 chuck cannot hold 5/32in or 1/4in tube even when they look close on the shelf.
If the port faces a wall or you need to route sideways out of a cramped actuator, an elbow such as the PL mini turns the run instead of adding a bent-tube loop. For panel work a PM bulkhead passes the Dia 4 line through a hole and secures it with an M12x1 locknut.
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-M FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum capability -750 mmHg (10 Torr), proof pressure 1.5 MPa, and a working temperature range of -20 to +70 C. The fitting accepts Dia 4 mm soft nylon or polyurethane tube and terminates in a 1/8in PT male thread with sealant pre-applied. These are the resin-line figures - the metal BPC family is rated lower on pressure (0.9 MPa) but higher on temperature (0 to +150 C).
No. The chuck set inside the PC401-M is machined for a 4 mm outside diameter and nothing else - a close-looking imperial tube will not seat on the gasket and will blow off under pressure. Match the OD exactly, and if your run uses 5/32in or similar tube, source the matching imperial connector rather than adapting here. The tube also needs to be soft nylon or polyurethane; rigid nylon of the wrong wall stiffness will not slide over the spring gasket.
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