Airtac PYB Y-Type Threaded Tee Fitting PYB4M5-S
SUS304 stainless variant (-S)The AirTAC Airtac PYB Y-Type Threaded Tee Fitting PYB4M5-S is a genuine branch y for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeBranch Y
- SeriesPYB
- 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 PYB Y-Type Threaded Tee Fitting PYB4M5-S
The PYB4M5-S is AirTAC's branch Y one-touch fitting in its stainless variant. Two Dia 4 mm tube legs meet in a Y and the male branch between them carries an M5x0.8 thread, so a single port can feed two 4 mm lines that leave at a natural angle instead of fighting each other for space. Push the soft nylon or polyurethane tube home and the internal chuck grips it; press the release ring and it frees again. Unlike the larger threaded sizes, which arrive with sealant on the thread, the M5 stud is sealed by a captive gasket, so no tape or paste belongs on this port.
The -S suffix changes the material, not the ratings: the branch stud is SUS304 stainless steel while the body remains PBT, so this is the right choice when the threaded branch itself sits in splash, condensate or wash-down mist but the tube legs stay dry. Every published figure is unchanged from the grey standard part - 0 to 1.0 MPa working pressure, -750 mmHg vacuum, 1.5 MPa proof pressure and -20 to +70 C.
Airtac PYB Y-Type Threaded Tee Fitting PYB4M5-S Technical Specifications
| Model | Airtac PYB Y-Type Threaded Tee Fitting PYB4M5-S |
|---|---|
| Type | Branch Y |
| Series | PYB |
| Connection | Push-in one-touch |
| Body material | Stainless steel 304 (-S variant) |
| 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. Stainless (-S): SUS304 in place of brass - a solid SUS304 body on the PC and POC straight connectors, and a PBT body with a SUS304 stud on the elbow, tee and branch shapes. Working pressure, proof pressure and temperature are unchanged from the standard version. AirTAC publishes flow as a characteristic curve rather than a single figure, so no L/min value is listed.
Model Code: Airtac PYB Y-Type Threaded Tee Fitting PYB4M5-S
| PYB | Branch Y. |
|---|---|
| 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. |
| -S | Stainless-steel body. |
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 PYB Y-Type Threaded Tee Fitting PYB4M5-S Is Used
Laboratory dispensing head
A micro-dispensing station splitting one M5 output on a small valve block into two 4 mm lines - one to the nozzle actuator, one to a compact venturi - with the stainless stud shrugging off cleaning fluids around the bench.
Pick-and-place gantry
Feeding twin 4 mm lines to a compact gripper and its blow-off nozzle from a single M5 port on the end-of-arm tooling plate, where two separate ports simply do not exist.
Semiconductor test jig
Routing air to clamp cylinders on a copper-sensitive electronics test fixture, where the SUS304 threaded branch keeps the port area free of brass in a wash-down-capable jig frame.
Is the Airtac PYB Y-Type Threaded Tee Fitting PYB4M5-S the Right Part?
Dia 4 is the smallest tube bore the PYB family offers on an M5 branch - the M5 ladder contains only Dia 4 and Dia 6, so there is no size below this one and the step up is the PYB6M5-S, whose wider 6 mm bore suits lines that feed slightly thirstier actuators. If the port itself is the constraint, the thread step up is the 1/8 PT branch (PYB401-S), which the same 4 mm tube slots into unchanged.
Measure the tube before ordering: this fitting holds Dia 4 mm only, and a 1/4 inch line at roughly 6.35 mm OD is a different size entirely and will neither insert nor seal.
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 PYB Y-Type Threaded Tee Fitting PYB4M5-S FAQ
It is a branch Y one-touch fitting for Dia 4 mm soft nylon or polyurethane tube with an M5x0.8 male branch thread. Working pressure 0 to 1.0 MPa (0 to 10 kgf/cm2), negative pressure down to -750 mmHg (10 Torr), proof pressure 1.5 MPa and operating temperature -20 to +70 C. The SUS304 stud and PBT body carry these same figures as the standard grey part.
On the PYB family AirTAC keeps the one-touch body in PBT and makes the male branch stud SUS304, so the stainless goes exactly where the fitting threads into your machine - the point where coolant, condensate or cleaning agents actually collect. The tube legs clip into the same protected chuck assembly as any other part in the range, so the corrosion-exposed surface is the one that has been upgraded.
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