Bulkhead union, plastic 4 mm with nut

The plastic bulkhead fitting. Lighter than brass and cheaper, working the same way: through the hole, nut behind, tube in on either side.

On a plastic enclosure or a thin sheet panel this is the sensible choice, not least because no galvanic corrosion can start between two metals. Where things get pulled or knocked, stay with brass.

Specifications

• Tube outside diameter: 4 mm
• Material: engineering plastic
• Working pressure: vacuum to 10 bar
• Temperature range: 0 to +60 °C
• Medium: compressed air and vacuum
• Series: CDC PM
• Manufacturer: CDC Pneumatics (South Korea)