Airtac BB Double Male Thread Straight Connector BB0404
The AirTAC Airtac BB Double Male Thread Straight Connector BB0404 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 BB0404
The BB0404 is a straight male connector with a 1/2in PT male thread on each end, letting you join two 1/2in female ports in line or adapt a run of pipe without a coupling plus nipple. The body is nickel plated for a hard, corrosion-resistant finish on the shop floor.
What sets this family apart from a one-touch resin fitting is the pressure and temperature envelope: 3.0 MPa proof pressure and a working range of 0 to +150 C, with vacuum capability down to -750 mmHg. That headroom is why a metal BB0404 gets specified near hot surfaces and on permanently made-up pipework where a push-in fitting would creep or soften.
Airtac BB Double Male Thread Straight Connector BB0404 Technical Specifications
| Model | Airtac BB Double Male Thread Straight Connector BB0404 |
|---|---|
| Type | Male / male connector |
| Series | BB |
| Connection | Threaded both ends |
| 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. 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 BB0404
| 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. |
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 BB0404 Is Used
Injection mould hot-side air circuits
Ties 1/2in PT ports on mould temperature control units and dryer manifolds, where the 150 C ceiling covers air heated well past what a resin push-in fitting survives.
Industrial washer and drying tunnel lines
Joins 1/2in pipework on parts-washer blow-off and drying tunnel sections, a permanently made-up joint that sees hot, wet air day after day.
Compressor house header spools
Extends 1/2in branch take-offs on compressor headers and valve panels, using the 3.0 MPa proof pressure as margin against pressure spikes and pulsation.
Is the Airtac BB Double Male Thread Straight Connector BB0404 the Right Part?
Step down one rung and you reach BB0304, which pairs a 3/8in male thread with the same 1/2in male thread - the sensible pick when the second port is smaller. There is no step above 1/2in in the BB ladder, so 0404 is the largest same-size connector in the range; confirm your port is genuinely 1/2in before ordering.
If the two ports differ in sex rather than size, BD0304 gives a female 3/8in with a male 1/2in in one part. If you need female on both ends at this size, BU0404 is the direct counterpart, and BZ04 is the honest way to blank an unused 1/2in port instead of capping it with tape.
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 BB0404 FAQ
The BB0404 is a male connector with a 1/2in PT male thread on both ends. Working pressure is 0-1.0 MPa (0-10 kgf/cm2), it handles vacuum to -750 mmHg, proof pressure is 3.0 MPa, and the temperature range is 0 to +150 C. The body is nickel plated. PT is the only thread standard in this family - there is no NPT or G version.
No. The BB0404 is a thread-to-thread connector with no tube port at all - both ends are 1/2in male PT threads for joining female ports or pipework. If you need to land a tube on a threaded port, use the BKC series instead, for example BKC1209-04, which takes a Dia 12 x Dia 9 tube into a 1/2in threaded body clamped by a locknut cap.
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