Airtac POC Round Thread Straight Connector POC803-S
SUS304 stainless variant (-S)The AirTAC Airtac POC Round Thread Straight Connector POC803-S is a genuine male connector (compact) for push-in tube connection, rated 0 - 1.0 MPa (0 - 10 kgf/cm2) with a 1.5 MPa proof pressure.
- TypeMale connector (compact)
- SeriesPOC
- 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 POC Round Thread Straight Connector POC803-S
The POC803-S is AirTAC's compact one-touch male connector in the stainless-steel variant, joining a Dia 8 mm soft nylon or polyurethane tube to a 3/8in PT male thread. On PC and POC connectors the -S suffix means the connector body itself is machined from SUS304 and the whole assembly is copper-free - not just the stud as on the elbow and tee families. Push the tube home and the stainless spring gasket and chuck lock it; press the POM release ring to free it.
Ratings are identical to the standard POC803: 0-1.0 MPa working pressure, 1.5 MPa proof pressure, -750 mmHg vacuum and -20 to +70 C. The thread arrives with sealant pre-applied, so the fitting seals straight into the port without extra tape. No published pressure, temperature or dimension changes come with the stainless option - you are buying corrosion resistance and copper-free wetted parts, nothing else re-rated.
Airtac POC Round Thread Straight Connector POC803-S Technical Specifications
| Model | Airtac POC Round Thread Straight Connector POC803-S |
|---|---|
| Type | Male connector (compact) |
| Series | POC |
| 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 POC Round Thread Straight Connector POC803-S
| POC | Male connector (compact). |
|---|---|
| 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 POC Round Thread Straight Connector POC803-S Is Used
Electroplating and plating-line pneumatics
Copper-free SUS304 wetted parts stop copper ions entering the air circuit above plating tanks, where dissolved copper can contaminate the bath chemistry.
Electronics clean-process tooling
On semiconductor and PCB handling equipment, a copper-free Dia 8 actuator supply avoids copper-catalysed deposits near sensitive process areas.
Coastal dockside machinery
A 3/8in stainless thread driving Dia 8 tubing on salt-air cranes and wash decks resists the pitting that swells brass connector bodies over time.
Is the Airtac POC Round Thread Straight Connector POC803-S the Right Part?
On the POC 3/8in row the ladder runs Dia 8, 10 and 12, so this is the smallest tube the 3/8in compact connector takes - there is no Dia 6 POC on a 3/8in thread, so do not order one expecting it. Stepping up to POC1003 buys more bore for longer runs to a single large consumer; stepping the thread down to POC802 keeps the same Dia 8 tube on a 1/4in port. Note the 1/2in POC starts at Dia 10, so an 8 mm tube cannot be paired with a 1/2in compact connector at all.
Tube OD must match exactly: a Dia 8 chuck will not grip 5/16in or 10 mm tube. If the port faces sideways in a tight space, the PL series elbow in stainless is the shape to move to rather than bending the tube hard at this connector.
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 POC Round Thread Straight Connector POC803-S 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. It connects Dia 8 mm soft nylon or PU tube to a 3/8in PT male thread. The connector body is SUS304 and the assembly is copper-free; release button and chuck are POM, guide aluminium alloy, spring gasket stainless, O-ring NBR. Identical ratings to the non-stainless POC803.
No. The chuck and spring gasket are designed for soft nylon or polyurethane tube of exactly Dia 8 mm OD. Braided hose, hard nylon rated beyond the soft grades, or any tube with an outer diameter other than 8 mm will not seal or release correctly, and the joint will weep under the 1.0 MPa working pressure.
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