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Description
4mm Tube to Tube Straight Coupling
Premium Push-Fit Pneumatic Connector for Professional Applications
Engineered for precision and reliability, this 4mm tube-to-tube straight coupling delivers instant, leak-proof connections in demanding pneumatic systems. The push-fit design eliminates the need for tools, reducing installation time whilst maintaining professional-grade performance.
Technical Specifications
| Tube Diameter | 4mm (both ends) |
| Connection Type | Push-fit / Push-to-connect |
| Configuration | Straight inline coupling |
| Material | High-grade engineering polymer |
| Application | Pneumatic air lines, instrumentation, automation |
Key Features
- ✓Tool-Free Installation – Push-fit mechanism enables rapid assembly and disassembly without spanners or wrenches
- ✓Leak-Proof Seal – Precision-engineered O-ring and collet design ensures reliable, airtight connections under pressure
- ✓Compact Inline Design – Minimal footprint allows installation in confined spaces and tight routing scenarios
- ✓Chemical & Temperature Resistant – Engineered polymer withstands workshop fluids, oils, and temperature fluctuations
- ✓Universal Compatibility – Works with polyurethane, nylon, and PTFE tubing in standard 4mm OD specification
Professional Applications
Ideal for workshop air tools, pneumatic control systems, instrumentation panels, automated machinery, compressor distribution networks, and mobile service vehicles. Trusted by technicians, fleet managers, and maintenance teams across industrial and automotive sectors.
Installation Guide
- Prepare the tube – Cut tubing squarely using a sharp tube cutter; ensure clean, burr-free edge
- Insert fully – Push tube firmly into coupling until it reaches the internal stop (typically 12–15mm insertion depth)
- Verify connection – Gently pull tube to confirm collet has engaged and locked the tube securely
- Pressurize system – Gradually introduce air pressure and inspect for leaks at connection points
- Disconnect (when required) – Press collet release ring whilst pulling tube to disengage
⚙️ Maintenance & Care
Inspect fittings periodically for wear, cracks, or contamination. Replace if O-ring damage or collet wear is evident. Store spare fittings in a clean, dry environment away from direct sunlight and extreme temperatures to preserve material integrity.
Why Choose Air Compressors UK?
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