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METAL PU FITTING STRAIGHT 4MM
METAL PU FITTING STRAIGHT 4MM
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AirCraft Metal PU Fitting Straight Union 4mm (SG MPUC04)
At a Glance; Compact straight union to join two 4mm push-in pneumatic tubes in-line.
The AirCraft SG MPUC04 Metal PU Fitting Straight is the no-drama way to connect two 4mm pneumatic/PU tubes in a clean, in-line run. Whether you’re extending a line, repairing a cut section, or building a neat pneumatic layout, this straight union coupler gives you a quick, secure push-in connection on both ends. With durable metal construction and a compact profile, it’s a solid choice for workshop and industrial compressed-air setups where tidy routing and reliable sealing matter.
Quick, tidy tube-to-tube connection with an AirCraft metal straight union
Ideal for line extensions and repairs, this push-in coupler keeps your 4mm pneumatic tubing neatly joined and easy to service.
Features
- Straight union design Joins two tubes in-line for a clean, compact air line connection.
- 4mm push-in ports (both ends) Fast, secure tube fitment for quick assembly and maintenance.
- Metal construction Durable body built for everyday workshop pneumatic use.
- Compact profile Fits neatly into tight installs and tidy cable/air management routes.
Benefits
- Fast repairs; Restore a damaged air line section without replacing the entire run.
- Easy extensions; Add length to 4mm tubing quickly and keep routing neat.
- Reliable seal; Secure push-in grip helps reduce leak risk in your compressed-air system.
Extra Information
- Use clean, round 4mm pneumatic/PU tubing and ensure cuts are square before inserting.
- Push the tube in fully until it seats, then do a gentle pull-back test to confirm it’s locked.
- After installation, pressurise slowly and check for leaks using soapy water.
Pro Tip
- If a tube end is scratched or oval, trim it back and re-cut square—push-in fittings seal best on a clean, undamaged tube end.
Specifications
| Description | Spec |
|---|---|
| Brand | AirCraft |
| Cat No. | SG MPUC04 |
| Product Type | Metal PU/Pneumatic Push-In Straight Union |
| Tube Size | 4mm |
| Connections | Tube-to-Tube (Push-In x Push-In) |
| Fitting Style | Straight Union / Coupler |
| Material | Metal |
| Application | Pneumatic / Compressed Air Line Connection |
Safety
- Always depressurise the air system before installing or removing pneumatic fittings.
- Wear eye protection when working with compressed air and pressurised lines.
- Inspect tubing for cracks, kinks or wear and replace damaged sections before pressurising.
- Pressurise slowly after installation and check connections for leaks using soapy water (never use open flames).