Airtac PC Threaded Straight Connector PC603-S
SUS304 stainless variant (-S)The AirTAC Airtac PC Threaded Straight Connector PC603-S is a genuine male connector for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeMale connector
- SeriesPC
- 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 PC Threaded Straight Connector PC603-S
The PC603-S is the SUS304 stainless-steel version of AirTAC's PC male connector, joining a Dia 6 mm soft nylon or polyurethane tube to a 3/8in PT male taper thread. It is a one-touch fitting: push the tube in and the internal chuck grips it under the stainless spring gasket; press the POM release ring and the tube frees off again, so rework and re-routing take seconds.
On the -S build of the PC family the connector body itself is SUS304 and the whole part is copper-free, not just the stud - a detail that matters in electronics tools and plating lines where copper ions spoil the process. The release button and chuck stay POM, the guide is aluminium alloy, and the seal is an NBR O-ring. The rating is unchanged from the standard part: 0-1.0 MPa working, 1.5 MPa proof, -20 to +70 C. Dimensionally it swaps directly for the grey PC603, because the dimension tables for both are identical.
Airtac PC Threaded Straight Connector PC603-S Technical Specifications
| Model | Airtac PC Threaded Straight Connector PC603-S |
|---|---|
| Type | Male connector |
| Series | PC |
| 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 PC Threaded Straight Connector PC603-S
| PC | Male 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. |
| -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 PC Threaded Straight Connector PC603-S Is Used
Copper-free gas lines in electronics process tools
Semiconductor and PCB wet-process equipment often specifies copper-free wetted parts to avoid metal contamination. The PC603-S gives a 3/8in-threaded air take-off with an all-stainless body and no copper contact in the flow path.
Salt-air pneumatics on marine and aquaculture kit
On fish-farm feed systems, deck winches and dockside control cabinets, a brass fitting pitting from salt spray is a recurring leak source. The SUS304 body of the PC603-S resists that attack while keeping a single-hand-push connection for fast hose changes.
Rinsing and washdown stations in food plants
Bottling-line rinse headers and tray washers sit in constant damp. A PC603-S at the spray-bar inlet takes Dia 6 nylon drops to the nozzle manifold without the white oxide bloom that plain brass fittings leave on stainless pipework.
Is the Airtac PC Threaded Straight Connector PC603-S the Right Part?
Dia 6 is the smallest tube this 3/8in thread accepts on the PC ladder - the next options above it are Dia 8 (PC803-S), Dia 10 and Dia 12, each raising flow capacity by opening the bore. If your port is a 1/4in you step down to PC602-S; if it is a 1/2in you step up to PC604-S, and both carry the Dia 6 tube. Match the thread to the port, not the hose: oversizing the thread does not raise flow, it just wastes panel space.
Tube OD must match the fitting exactly. A Dia 6 chuck will not seal or hold 1/4in (6.35 mm) tube, even though the two are close enough to push in - always measure the tube before ordering.
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 PC Threaded Straight Connector PC603-S FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), proof pressure 1.5 MPa, vacuum to -750 mmHg (10 Torr), and a temperature range of -20 to +70 C. It accepts Dia 6 mm soft nylon or polyurethane tube on a 3/8in PT male taper thread. The body is SUS304 stainless steel and the construction is copper-free; the -S suffix does not alter any pressure or temperature figure compared with the standard grey PC603.
The PT male thread on the PC603-S arrives from AirTAC with sealant already applied, so it is ready to wind into a tapped port without extra tape or paste. Do not add a second sealant layer on top, and remember the M5 sizes in this catalogue are the exception - those use a sealing gasket instead of thread sealant.
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