Airtac PLM Right Angle Bulkhead Fitting PLM4
The AirTAC Airtac PLM Right Angle Bulkhead Fitting PLM4 is a genuine bulkhead male elbow for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeBulkhead male elbow
- SeriesPLM
- 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 PLM Right Angle Bulkhead Fitting PLM4
The PLM4 is an AirTAC PLM bulkhead male elbow, the smallest size in the family. It takes Dia 4 mm soft nylon or polyurethane tubing into a one-touch chuck and is designed to pass through a panel or machine wall, with the elbow turning the air path 90 degrees on the inside. The fixing side is secured by an M12x1 bulkhead locknut, which is the published locknut thread for Dia 4 in this catalogue.
This is a resin-and-brass one-touch part, not the metal BPC line: it is rated 0-1.0 MPa (0-10 kgf/cm2) working pressure, -750 mmHg (10 Torr) vacuum, 1.5 MPa proof pressure and -20 to +70 C. Internally it uses a POM release button and chuck, an aluminium-alloy guide, a stainless spring gasket and an NBR O-ring. To connect, push the tube straight in until it bottoms; the chuck grips it under spring pressure, and pressing the release ring frees it again.
Airtac PLM Right Angle Bulkhead Fitting PLM4 Technical Specifications
| Model | Airtac PLM Right Angle Bulkhead Fitting PLM4 |
|---|---|
| Type | Bulkhead male elbow |
| Series | PLM |
| 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 PLM Right Angle Bulkhead Fitting PLM4
| PLM | Bulkhead male elbow. |
|---|---|
| 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 PLM Right Angle Bulkhead Fitting PLM4 Is Used
Compact gripper feed on a pick-and-place unit
Mount the PLM4 through the base plate of a small pneumatic gripper manifold so the 4 mm supply line enters at 90 degrees instead of fouling the gripper jaws or the surrounding robot arm.
Benchtop analytical instrument sub-panel
On laboratory analysers and micro-dispense rigs, route Dia 4 carrier-air lines through an internal bulkhead so the instrument cover can be removed without disconnecting a single fitting.
Control cabinet wall pass-through
Take 4 mm pilot lines out of an electrical control cabinet to a nearby valve or small cylinder, using the M12x1 locknut to give a neat, serviceable entry rather than a grommet.
Is the Airtac PLM Right Angle Bulkhead Fitting PLM4 the Right Part?
Dia 4 is the smallest tube size AirTAC offers in this family, so there is no smaller step down; the only neighbour is the Dia 6 sibling above it. Stepping up to Dia 6 roughly increases the bore available to the actuator, which matters on longer runs where restriction is felt, but it also moves you to a larger M14x1 locknut and a bigger panel hole. Stay at Dia 4 only if the rest of the circuit - tubing, cylinder ports, flow controls - is genuinely 4 mm.
The elbow shape is the right answer when a straight connector through the wall would leave the tube bent sharply against the panel. Remember that tube OD must match exactly: this fitting will not grip 6 mm tube no matter how hard it is pushed, and 4 mm tube will not seal in a Dia 6 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 PLM Right Angle Bulkhead Fitting PLM4 FAQ
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. Tube size is Dia 4 mm, the smallest in the PLM family, and the bulkhead fixing is an M12x1 locknut thread. It accepts soft nylon or polyurethane tubing only, in the standard grey finish.
Drill a panel hole suited to the M12x1 locknut for Dia 4, insert the fitting body from the front, and run the locknut up from behind until the body is held square to the panel. Threaded parts in this catalogue arrive with sealant already applied to the thread, so no extra tape is normally needed. The elbow then points the tube connection sideways inside the enclosure, and you simply push the Dia 4 tube in until it stops - the internal chuck does the gripping.
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