Airtac PM Panel Mount Straight Coupling PM8D
The AirTAC Airtac PM Panel Mount Straight Coupling PM8D is a genuine bulkhead union for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeBulkhead union
- SeriesPM
- 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 PM Panel Mount Straight Coupling PM8D
The AirTAC PM8D is a bulkhead union from the PM one-touch range: it joins two lengths of Dia 8 mm soft nylon or polyurethane tubing through a hole in a panel, enclosure wall or guard sheet, so the tube run crosses the barrier without any fitting body left hanging outside. Both ends are push-fit - the tube slides past the chuck and stainless spring gasket until it seats, and the chuck grips it; pressing the release ring frees the tube again. The D suffix gives the whole body in black rather than the standard grey, a finish change only.
This is a resin and brass one-touch part, so it runs at 0-1.0 MPa working pressure (0-10 kgf/cm2), handles vacuum down to -750 mmHg (10 Torr), carries a proof pressure of 1.5 MPa and works from -20 to +70 C. The POM chuck and release ring sit on an aluminium-alloy guide with an NBR O-ring sealing each tube. For the Dia 8 size the panel locknut thread is M16x1 - a detail that matters when you are cutting the bulkhead hole, because the nut is what clamps the fitting to the sheet.
Airtac PM Panel Mount Straight Coupling PM8D Technical Specifications
| Model | Airtac PM Panel Mount Straight Coupling PM8D |
|---|---|
| Type | Bulkhead union |
| Series | PM |
| 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 PM Panel Mount Straight Coupling PM8D
| PM | Bulkhead union. |
|---|---|
| 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 PM Panel Mount Straight Coupling PM8D Is Used
Guard-panel pass-through on packaging lines
Route the Dia 8 supply to a carton-sealing head through the machine guard sheet with the PM8D, keeping both tube stubs and the release rings inside the enclosure for service access.
Control cabinet air feed
Bring a workshop air drop through the side wall of an electrical cabinet on a CNC or inspection station, then tee it off inside to valve manifolds without external fittings to snag.
Vacuum fixtures on test benches
The -750 mmHg (10 Torr) vacuum rating lets the PM8D carry suction lines through the backboard of a leak-test or pick-and-place bench, with the M16x1 locknut clamping to thin aluminium plates.
Is the Airtac PM Panel Mount Straight Coupling PM8D the Right Part?
PM comes in Dia 4, 6, 8, 10 and 12. Stepping down to PM6D buys a slimmer bulkhead for lighter runs like sensor or pilot lines; stepping up to PM10D increases the bore for short main feeds, and its locknut grows to M20x1. The panel hole and the locknut thread both change with tube size, so check the hole diameter before drilling a mounting plate for a mixed-size build. Tube OD must match exactly on both sides: a Dia 8 bulkhead union will not hold 1/4 in (6.35 mm) tube even though the difference looks small.
Choose a bulkhead union when the requirement is to pass tube through a barrier and continue on the other side. If you instead need a threaded port on the outside face, PMF (bulkhead female connector) is the threaded counterpart; if the run turns 90 degrees after the wall, PLM (bulkhead male elbow) saves an extra fitting.
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 PM Panel Mount Straight Coupling PM8D FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure to -750 mmHg (10 Torr), proof pressure 1.5 MPa, temperature -20 to +70 C. It joins two Dia 8 mm soft nylon or polyurethane tubes on both sides, has a black body (D suffix) and uses an M16x1 locknut thread for the bulkhead panel mounting. Tube standard on this range is PT.
AirTAC does not publish a recommended hole diameter, so drill to suit the M16x1 locknut of the Dia 8 size and the clamping shoulder of the body - check the PM8 dimension table for the exact nut outside diameter. What is fixed is the tubing: both ports accept Dia 8 mm OD only, and the tube must bottom out inside the chuck before you torque the locknut to the panel.
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