Barb Fitting M-3AU-2/M-5AU-2 Mini Fitting

Brand :
SMC
Caution
- The minimum order quantity varies depending on the selected model. Please check the quotation / order screen for details.
- Refer to the catalog for product specifications.
- Product images may be representative images. Refer to the catalog for details.
Product Description
A miniature tube fitting from SMC Corporation.
[Features]
· Small and can be removed without tools.
· Compact piping space.
Barb Fitting M-3AU-2 and M-5AU-2 Specifications

Barb Fitting M-3AU-2 and M-5AU-2 outline drawing
| Applicable tube Outer diameter / Inner diameter (mm) | Connection thread | Model | H | A | B | C | D | E | F | Weight g |
|---|---|---|---|---|---|---|---|---|---|---|
| ø2/ø1.2 | M3 × 0.5 | M-3AU-2 | 4.5 | 9 | 3 | 4 | 5 | 4 | 0.9 | 0.7 |
| M5 × 0.8 | M-5AU-2 | 7 | 10 | 4 | 7.7 | 1.5 |
Components
| Number | Part name | Materials | Additional notes |
|---|---|---|---|
| 1 | Sleeve | C3604 | Electroless nickel plating |
| 2 | Barb fitting | C3604 | Electroless nickel plating |
| 3 | Gasket | NBR, SUS304 | - |
Mini Fitting M Series Common Specifications (Reference)

Mini Fitting M series structure
- Tube
- Barb: Shaped in a way that makes tube insertion easy. It also holds the tube securely.
- Sleeve: Attach the sleeve to hold the tube securely. The tube is easily removed by detaching the sleeve. With electroless nickel plating.
- Body: Features electroless nickel plating.
- Gasket: Low tightening torque. Tight seal.
- One-touch fitting.
Specifications
| Tube materials | Polyurethane |
|---|---|
| Applicable tube (outer diameter / inner diameter) | ø2/ø1.2 |
| Usable fluids | Air, water Note 1: |
| Maximum operating pressure | 1 MPa Note 2: |
| Ambient temperature and working fluid temperature | -5 to 60°C, For water: 0 to 40°C (no freezing) |
| Connection size | M3, M5, ø3.2, ø4 |
| Thread | JIS B0205 (metric coarse thread) |
Note 1: Use surge pressures below that of the maximum operating pressure.
Note 2: Apply the tube's maximum operating pressure when using a tube.