 
 
Metric Dimension
| Model | UEF-4U | |
|---|---|---|
| Connecting Thread | M5x0.8 | |
| Tube Size | 4x2.5 | |
| Tube Type | PU4 | |
| Effective Area (mm2) | -- | |
| Material | Brass (electroplated with nickel) | |
| Weight (g) | -- | |
| Remark | Accessories | 2 gaskets | 
| Sales Unit | 10 pcs /set | |
Q1: What tube materials are supported?
 A: PU 4×2.5 and nylon (PA) 4×2.5. Verify OD tolerance/hardness and run pull/leak tests.
Q2: Where are the two rubber washers located?
 A: One beneath the slotted plug, one beneath the M5 mounting seat—both are face-seal positions.
Q3: Do I need PTFE tape or thread sealant?
 A: Normally no—the face-seal is sufficient. If site practice requires it, apply a thin layer and keep sealant out of the flow path.
Q4: Is it reusable?
 A: Yes. Inspect rubber washers and threads during maintenance; replace worn parts.
Q5: Is it suitable for high-frequency operation?
 A: Yes. The dual rubber washers + plated brass build handles frequent cycling and micro-vibration.
Q6: Can it be used for vacuum or higher pressure?
 A: Intended for clean, dry compressed air. For vacuum, higher pressure, or special media, validate material compatibility and proof pressure first.