Airtac PMF Female Thread Bulkhead Straight Through Fitting PMF401
The AirTAC Airtac PMF Female Thread Bulkhead Straight Through Fitting PMF401 is a genuine bulkhead connector for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeBulkhead connector
- SeriesPMF
- 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 PMF Female Thread Bulkhead Straight Through Fitting PMF401
The PMF401 is an AirTAC PMF bulkhead connector, the one-touch fitting built to pass a pneumatic line through a panel wall. On the tube side it accepts Dia 4 mm soft nylon or polyurethane tubing; on the outside it presents a 1/8" PT male thread. To install, you drill the panel hole, pass the threaded stud through, and lock it down with the bulkhead locknut - which, for Dia 4 tube, is an M12x1 thread. The connection itself is one-touch: push the tube home and the internal chuck grips it, press the release ring and it frees.
This is a resin/brass fitting, so it carries the standard resin spec: 0-1.0 MPa (0-10 kgf/cm2) working pressure, -750 mmHg (10 Torr) vacuum capability, 1.5 MPa proof pressure and a -20 to +70 C temperature window. The POM release button and chuck sit on an aluminium-alloy guide with a stainless spring gasket and NBR O-ring sealing the tube. The 1/8" thread arrives from the factory with sealant already applied, so no extra tape or paste is needed on the port.
Airtac PMF Female Thread Bulkhead Straight Through Fitting PMF401 Technical Specifications
| Model | Airtac PMF Female Thread Bulkhead Straight Through Fitting PMF401 |
|---|---|
| Type | Bulkhead connector |
| Series | PMF |
| 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 PMF Female Thread Bulkhead Straight Through Fitting PMF401
| PMF | Bulkhead 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 PMF Female Thread Bulkhead Straight Through Fitting PMF401 Is Used
Control cabinet pass-through
Mount the PMF401 through the side wall of a compact PLC control cabinet so the solenoid valves stay inside in clean air while the Dia 4 tubing runs out to sensors and small actuators on the machine frame.
Bench-top test station
On a leak-test or sample-handling bench, the 1/8" PT stud terminates a regulator line at the panel edge and the Dia 4 mm outlet feeds fine tubing to a small pick-and-place nozzle or miniature cylinder.
Conveyor guard feed
Bring a single Dia 4 mm air line through the sheet-metal guard of a small packaging conveyor to supply a cleaning or ejection jet, keeping the connection inside the guard and the thread accessible outside.
Is the Airtac PMF Female Thread Bulkhead Straight Through Fitting PMF401 the Right Part?
Dia 4 mm is the smallest tube size in the PMF bulkhead ladder - there is nothing below it. The next step up on the same 1/8" thread is Dia 6 mm (PMF601), which gives you a larger bore for lower pressure drop on the same port; if the run is short and the actuator small, staying at Dia 4 keeps the fitting and the hole in your panel as compact as possible. Match the thread to the port, not to habit: a 1/8" PT stud belongs in a 1/8" tapped hole or a matching adapter.
Two tube rules are absolute here. First, the tubing OD must be exactly Dia 4 mm - the chuck cannot seal 1/4" (6.35 mm) imperial tube or any other near size. Second, only soft nylon and polyurethane are approved; rigid nylon will not seat on the gasket. If you need a tube-to-tube pass-through instead of a threaded outlet, that is the PM bulkhead union, not the PMF.
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 PMF Female Thread Bulkhead Straight Through Fitting PMF401 FAQ
It is an AirTAC PMF bulkhead one-touch connector for Dia 4 mm soft nylon or polyurethane tube with a 1/8" PT male thread and an M12x1 bulkhead locknut. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), it handles vacuum to -750 mmHg (10 Torr), proof pressure is 1.5 MPa, and the operating temperature range is -20 to +70 C. The body is resin/brass construction with a POM chuck, stainless spring gasket and NBR O-ring.
The PT thread ships with sealant already applied by AirTAC, so it can go straight into the port without extra tape. Tubing is more restricted: only soft nylon or polyurethane with a Dia 4 mm outside diameter will seal, and the size must match exactly - a slightly off-size or rigid tube will leak or fail to lock. To release, push the tube in and press the release ring before pulling it out.
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