Airtac PKD Reducing Thread 5-Way Fitting PKD6-401D
The AirTAC Airtac PKD Reducing Thread 5-Way Fitting PKD6-401D is a genuine male reducer triple branch for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeMale reducer triple branch
- SeriesPKD
- 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 PKD Reducing Thread 5-Way Fitting PKD6-401D
The PKD6-401D is an AirTAC male reducer triple branch, the black-colour version of the smallest fitting in AirTAC's three-strong PKD ladder. It screws into a 1/8in PT port and presents three one-touch ports: two Dia 6 mm through-runs and a Dia 4 mm branch. Push each soft nylon or polyurethane tube straight home and the POM chuck grips it; press the release ring to let it go. No ferrules, no clamps, no tools.
This is the resin/brass one-touch profile, not the metal BP line: 0-1.0 MPa working, 1.5 MPa proof, -750 mmHg vacuum and -20 to +70 C. The D suffix turns the whole body black - on PC and POC the D changes only the release button, so do not expect that here. The male thread arrives with sealant already applied, and because the runs and branch take different tube sizes you cannot cross-fit them.
Airtac PKD Reducing Thread 5-Way Fitting PKD6-401D Technical Specifications
| Model | Airtac PKD Reducing Thread 5-Way Fitting PKD6-401D |
|---|---|
| Type | Male reducer triple branch |
| Series | PKD |
| 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 PKD Reducing Thread 5-Way Fitting PKD6-401D
| PKD | Male reducer triple branch. |
|---|---|
| 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 PKD Reducing Thread 5-Way Fitting PKD6-401D Is Used
Pick-and-place gripper feed
Branching a Dia 4 vacuum ejector or gripper line off a Dia 6 air drop on a compact pick-and-place head, where the 1/8in male thread matches the small manifold port directly.
Bench-top lab automation
Feeding Dia 4 micro-actuators on laboratory or diagnostic bench equipment from a Dia 6 distribution run, keeping the plumbing down to one fitting instead of a tee plus a reducer.
Blow-off chip clearing
Tapping a Dia 4 blow-off nozzle for chip and swab clearing on a small CNC or packaging machine from a Dia 6 spine run, with the reducer built into the branch itself.
Is the Airtac PKD Reducing Thread 5-Way Fitting PKD6-401D the Right Part?
PKD6-401D sits at the bottom of a very short ladder. AirTAC makes exactly three male reducer triple branches: this one, PKD8-602 (Dia 8 runs, Dia 6 branch, 1/4in thread) and PKD10-803 (Dia 10 runs, Dia 8 branch, 3/8in thread). There is no smaller PKD, so if Dia 4 runs are what you need, use a PGJ plug-in reducer or a PEB male branch tee with separate fittings instead. Note that stepping up to PKD8-602 changes the thread to 1/4in as well as the tube sizes.
Tube OD must match exactly. The Dia 6 runs will not seal on 1/4in (6.35 mm) tube even though 6.35 looks close to 6, and the Dia 4 branch has no tolerance for anything other than true Dia 4 tubing. Match the 1/8in thread to the port before ordering, not after.
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 PKD Reducing Thread 5-Way Fitting PKD6-401D FAQ
It is an AirTAC male reducer triple branch with two Dia 6 mm runs, one Dia 4 mm branch and a 1/8in PT male thread, finished in black. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, vacuum down to -750 mmHg (10 Torr), and temperature range -20 to +70 C. Soft nylon or polyurethane tubing only. AirTAC publishes flow as a characteristic curve, so size by tube bore rather than a quoted figure.
AirTAC makes exactly three male reducer triple branches: PKD6-401 (Dia 6 runs / Dia 4 branch, 1/8in), PKD8-602 (Dia 8 / Dia 6, 1/4in) and PKD10-803 (Dia 10 / Dia 8, 3/8in). Each steps one tube size down from run to branch and one thread size up. Any other combination needs a different shape, such as a PEB male branch tee paired with a PGJ union reducer.
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