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PU Pneumatic Straight Push-In Fitting — PU4 PU6 PU8 PU10 PU12, 4–12mm Air Hose Tube
PU Pneumatic Straight Push-In Fitting PU4 PU6 PU8 PU10 PU12, 4–12mm Air Hose Tube
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PU Pneumatic Straight Push-In Fitting — PU4 / PU6 / PU8 / PU10 / PU12
These PU pneumatic straight push-in fittings provide a fast, tool-free connection for polyurethane (PU) and nylon air hose tubing in pneumatic systems. Simply push the tube into the fitting until it clicks — the internal collet grips the tube securely and the O-ring seals the connection. Available in five sizes to cover the most common PU tube outer diameters from 4mm to 12mm.
Key Specifications
| Parameter | Value |
|---|---|
| Fitting Type | Straight push-in (one-touch) |
| Compatible Tube OD | PU4 (4mm) / PU6 (6mm) / PU8 (8mm) / PU10 (10mm) / PU12 (12mm) |
| Material | Plastic body + stainless steel collet + NBR O-ring |
| Compatible Tube Types | PU (polyurethane), PA (nylon), PE tubing |
| Max Working Pressure | Typically 0.8–1.0 MPa (check variant) |
| Connection Method | Push-in, tool-free; pull collar to release |
| Origin | CN |
Why Choose Push-In Fittings?
- Tool-free installation — Push tube in to connect; pull the release collar back and pull tube to disconnect — no wrenches or thread tape needed
- Secure collet grip — Stainless steel collet teeth bite into the tube OD under pressure, preventing pull-out even at high flow rates
- NBR O-ring seal — Provides an airtight seal compatible with compressed air and inert gas applications
- 5 sizes available — PU4 through PU12 covers the full range of standard PU tube sizes used in pneumatic automation and workshop equipment
- Reusable — Connect and disconnect repeatedly without degrading the seal or collet performance
Typical Applications
- Air compressor hose connections in workshop and industrial settings
- Pneumatic cylinder and valve manifold tubing connections
- CNC router and laser cutter air assist line connections
- 3D printer pneumatic extruder (Bowden tube) fittings (PU4)
- Aquarium and hydroponic air line connections
- Vacuum system tubing connections
Frequently Asked Questions
Q: How do I release the tube from the fitting?
Depressurize the line first, then push the release collar (the outer ring) toward the fitting body while simultaneously pulling the tube out. Do not pull the tube without pressing the release collar — this may damage the collet teeth.
Q: Can I use these with silicone tubing?
Push-in fittings are designed for semi-rigid tubing (PU, PA, PE). Soft silicone tubing does not have sufficient wall rigidity for the collet to grip reliably. Use barb fittings with hose clamps for silicone tubing.
Q: What is the maximum pressure rating?
Typical working pressure is 0.8–1.0 MPa (8–10 bar / 116–145 PSI) for standard PU tube. Always verify the pressure rating of both the fitting and the tube before use in high-pressure applications.
Package Contents
- Boxed quantity of PU pneumatic straight push-in fittings (size and quantity per selected variant)
