Airtac BD Female-Male Straight Connector BD0204
The AirTAC Airtac BD Female-Male Straight Connector BD0204 is a genuine male and female connector rated to 3.0 MPa proof pressure and 0 to +150 °C, for joining threaded pipe runs.
- TypeMale and female connector
- SeriesBD
- 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 BD Female-Male Straight Connector BD0204
The BD0204 is a one-piece reducing connector that changes sex and size in the same fitting: a 1/4 in female PT on Thread I and a 1/2 in male PT on Thread II. The body is nickel-plated brass-family metal, machined as a single part, so there is no joint line or seal cartridge between the two threads to work loose on a vibrating line.
This is the metal joint family, not a one-touch resin series, and the numbers show it: working pressure 0-1.0 MPa, vacuum down to -750 mmHg, proof pressure 3.0 MPa and a 0 to +150 C temperature range. That is twice the proof pressure and roughly double the temperature ceiling of the push-in line, which is exactly why these turn up bolted to dryer heads, oven frames and moulding tools where a resin body would creep or crack. Note the code order: Thread I is the female half, Thread II the male half - but the datasheet does not fix which physical end is which, so confirm by eye when plumbing.
Airtac BD Female-Male Straight Connector BD0204 Technical Specifications
| Model | Airtac BD Female-Male Straight Connector BD0204 |
|---|---|
| Type | Male and female connector |
| Series | BD |
| 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 BD Female-Male Straight Connector BD0204
| BD | Male and female 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 BD Female-Male Straight Connector BD0204 Is Used
Injection moulding machine dryers
Hot-air dryer and mould-temperature-control circuits run close to the barrel where resin push-in fittings soften. The BD0204 steps a 1/4 in female control drop up to a 1/2 in male manifold port and holds its rating to 150 C.
Bakery oven air knives
Blower-fed air knives above a travelling oven belt see ambient temperatures that retire plastic bodies. A 1/4 in female feed married to a 1/2 in male header thread suits the permanent pipework at the oven end.
Autoclave and steriliser services
Steam-adjacent instrument air and cooling lines on laboratory autoclaves sit in the 100-150 C band. The 3.0 MPa proof pressure of the BD0204 covers the pressure spikes that accompany heat-up cycles on a 1/2 in utility thread.
Is the Airtac BD Female-Male Straight Connector BD0204 the Right Part?
You are stepping up from a 1/4 in female branch to a 1/2 in male port here. Step the male end down and the BD0203 (female 1/4 to male 3/8 PT) is the real next size; step the female end up and the BD0304 (female 3/8 to male 1/2 PT) covers it. There is no BD0205 and no larger female-to-male pair on the 1/2 male end than BD0304 in this family - those are the edges. If you need male-to-male at the same sizes, the BB0204 exists as a straight alternative.
A BD connector earns its place over a BB plus a separate reducing bushing whenever you want one machined part, one thread engagement and one fewer leak path. And if the 1/2 in manifold port next to this one is going unused, a BZ04 hex plug is the honest answer - do not leave an open PT port on a 3.0 MPa-rated circuit.
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 BD Female-Male Straight Connector BD0204 FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum capability down to -750 mmHg (10 Torr), proof pressure 3.0 MPa, and an operating temperature range of 0 to +150 C. This SKU is a reducing connector with a female 1/4 in PT on Thread I and a male 1/2 in PT on Thread II, in a nickel-plated body. Threads are PT throughout - this family is not offered in NPT or G.
PT is a tapered pipe thread, so the seal is made by thread interference - wrap the male threads with PTFE tape or apply a pipe sealant before assembly. There is no published O-ring or soft seal at the female port on this family, and AirTAC publishes no tightening torque for it, so tighten to good practice and leak-test. Also note this fitting carries no tube at all: it is a pure thread-to-thread adapter, so tubing choice and its own temperature rating sit elsewhere in your circuit.
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