Airtac BB Double Male Thread Straight Connector BB0203-S
SUS304 stainless variant (-S)The AirTAC Airtac BB Double Male Thread Straight Connector BB0203-S is a genuine male / male connector rated to 3.0 MPa proof pressure and 0 to +150 °C, for joining threaded pipe runs.
- TypeMale / male connector
- SeriesBB
- Working pressure0 - 1.0 MPa (0 - 10 kgf/cm2)
- Proof pressure3.0 MPa
- Temperature0 to +150 °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 BB Double Male Thread Straight Connector BB0203-S
The BB0203-S is a reducing male connector machined in solid SUS304 stainless steel: male PT thread on both ends, 1/4in stepping up to 3/8in, so it screws a 1/4in port directly onto a 3/8in line with no separate adapter in between. It belongs to AirTAC's metal pipe-joint family, not the one-touch range, and that difference shows up in the numbers.
This family is rated for 3.0 MPa proof pressure and 0 to 150 C continuous, roughly twice the proof pressure and double the temperature ceiling of a resin push-in fitting. It also holds -750 mmHg (10 Torr), so the same part can sit on a vacuum pick-up circuit as on a pressure line. Because the body is SUS304 throughout, the connector is copper-free, which matters on plating lines, rinse manifolds and any wet process where dissolved copper causes defects.
Airtac BB Double Male Thread Straight Connector BB0203-S Technical Specifications
| Model | Airtac BB Double Male Thread Straight Connector BB0203-S |
|---|---|
| Type | Male / male connector |
| Series | BB |
| Connection | Threaded both ends |
| 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 | 3.0 MPa |
| Temperature | 0 to +150 °C |
| Thread standard | PT (Rc tapered) unless the code says otherwise |
Nickel-plated metal body. AirTAC does not publish a per-part material breakdown for this family. This family is rated to 150 °C, but the TUBE is usually the limit - confirm your tubing's temperature rating before running it hot. Stainless (-S): SUS304 body throughout, for copper-free and corrosive environments. Pressure and temperature ratings are unchanged from the nickel-plated version. AirTAC publishes flow as a characteristic curve rather than a single figure, so no L/min value is listed.
Model Code: Airtac BB Double Male Thread Straight Connector BB0203-S
| BB | Male / 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 BB Double Male Thread Straight Connector BB0203-S Is Used
Plating and rinse-line air circuits
Copper-free SUS304 construction suits electroplating and rinse tank enclosures where nickel or copper fittings can contaminate the bath chemistry through condensate and splash-back.
Thermoformer platen vacuum lines
The -750 mmHg vacuum rating plus the 150 C ceiling let this 1/4in to 3/8in connector sit on vacuum pick-up circuits routed close to heated mould platens.
Commercial dishwashing and wash-down plant
Rinse-aid and conveyor wash-down systems spray hot water daily; a solid stainless threaded connector survives that duty where plated brass and resin joints corrode or creep.
Is the Airtac BB Double Male Thread Straight Connector BB0203-S the Right Part?
Check both ports before ordering. One size down on the small end is BB0202 (1/4in to 1/4in), which makes a straight same-size joint instead of a reduction; one size up is BB0204 (1/4in to 1/2in) when the large port is a half-inch. If the small side is actually 1/8in, drop to BB0103 (1/8in to 3/8in), and if both ends are 3/8in, BB0303 removes the reduction entirely.
Choose this BB shape when both machine ports are male and the joint will be made up permanently or rarely disturbed. If one side is a female port, the BD male-and-female connector in the same sizes saves stacking a separate adapter, and an unused threaded port is better closed with a BZ03 plug than left taped over.
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 0 to +150 °C
Airtac BB Double Male Thread Straight Connector BB0203-S FAQ
It is a SUS304 stainless male connector joining a PT 1/4in male thread to a PT 3/8in male thread. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), it withstands -750 mmHg (10 Torr) vacuum, proof pressure is 3.0 MPa, and the service temperature range is 0 to +150 C. The stainless variant carries exactly these same ratings and dimensions as the standard nickel-plated version.
PT is a taper thread, so a PTFE tape or liquid sealant is normal practice for a leak-tight joint; apply it to the male thread only and keep tape clear of the first thread so fragments cannot enter the air line. The stainless body needs no protective coating and does not alter the ratings - the 3.0 MPa proof and 150 C figures are unchanged. Tighten with a spanner on the hex; do not over-stress the smaller 1/4in end.
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