Airtac BZ External Hex Plug BZ02-S
SUS304 stainless variant (-S)The AirTAC Airtac BZ External Hex Plug BZ02-S is a genuine hexagon head cap plug rated to 3.0 MPa proof pressure and 0 to +150 °C, for joining threaded pipe runs.
- TypeHexagon head cap plug
- SeriesBZ
- 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 BZ External Hex Plug BZ02-S
The BZ02-S is a hexagon head cap plug with a single male 1/4in PT thread and no second port. Its whole job is to close off a spare threaded hole on a valve manifold, cylinder head or air-preparation block so the circuit stays sealed and the port face stays undamaged.
This is the SUS304 version: a solid stainless body rather than the nickel-plated standard line. The published ratings are unchanged, and they are the reason this family exists at all - 3.0 MPa proof pressure, working pressure 0-1.0 MPa, vacuum to -750 mmHg, and a 0 to 150 C temperature window. A resin push-in blanking approach cannot go near those figures, so stainless metal plugs like this one are what get used beside ovens and on hot hydraulic-adjacent circuits.
Airtac BZ External Hex Plug BZ02-S Technical Specifications
| Model | Airtac BZ External Hex Plug BZ02-S |
|---|---|
| Type | Hexagon head cap plug |
| Series | BZ |
| 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 BZ External Hex Plug BZ02-S
| BZ | Hexagon head cap plug. |
|---|---|
| 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 BZ External Hex Plug BZ02-S Is Used
Trailer brake-line spares
Trailer and commercial-vehicle air manifolds carry drilled but unused 1/4in ports. A BZ02-S blanks each one so road spray, salt and dirt never enter the brake circuit, and stainless survives the wash-down between trips.
Copper-free plating-rack air
Plating and surface-treatment lines specify copper-free pneumatic hardware to avoid metal contamination in process baths. A SUS304 plug on a 1/4in manifold port keeps the air circuit closed without introducing copper-bearing plated parts.
Valve manifold spare stations
Modular valve islands on packaging machines often arrive with more stations than the build needs. Plugging the unused 1/4in PT ports with BZ02-S keeps the manifold pressure-tight at 1.0 MPa working while leaving the ports clean for later expansion.
Is the Airtac BZ External Hex Plug BZ02-S the Right Part?
BZ02-S is the middle of a four-size plug ladder. One step down, BZ01-S closes a 1/8in port; one step up, BZ03-S closes a 3/8in port, with BZ04-S covering 1/2in at the top. Match the plug to the port thread exactly - a 1/4in plug will not seal an unfinished 3/8in hole. Every BZ size is PT thread only; there is no NPT or G variant in this range, so check the receiving port before ordering.
If the unused port might later feed a branch, fit a BB0202 male connector instead and cap the hose; the BZ02-S is the honest choice only when the port should stay closed. Being SUS304, it also suits wash-down cells and copper-free lines where a plated plug would corrode or contaminate.
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 BZ External Hex Plug BZ02-S FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), vacuum to -750 mmHg (10 Torr), proof pressure 3.0 MPa, operating temperature 0 to 150 C. This SKU has a single male 1/4in PT thread (code 02) with no second port, and the body is SUS304 stainless steel. Flow curves are published as characteristics only, so no L/min or Cv figure is quoted for plugs.
Thread the 1/4in PT male end into the port by hand first to avoid cross-threading, then tighten it with a suitable wrench on the hexagon head. Use a sealant or tape on the PT taper thread - PT is a tapered pipe thread that seals on the thread flanks, not on a fitted face. To remove, back the plug off with the wrench; because it is a plain cap with no tube or secondary connection, removal leaves the port ready for any future fitting.
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