Mini Pneumatic Push-In Fittings — Fast, Leak-Free Air Hose Connections in Tight Spaces
When you're building or repairing a compact pneumatic circuit and standard-size fittings simply won't fit, you need mini pneumatic push-in fittings engineered for small-bore tubing and miniature threaded ports. DIY enthusiasts, automation hobbyists, and small-equipment technicians all run into the same frustration: bulky connectors that crowd valve manifolds, create awkward bends, or leak under pressure. These mini pneumatic push-in fittings solve that problem with a slim profile and a secure, tool-free tube connection.
Each fitting features a push-in collet mechanism that grips standard OD pneumatic tubing — available in 3mm (approx. 1/8"), 4mm (approx. 5/32"), and 6mm (approx. 1/4") outer diameters — paired with a male metric thread (M3, M4, M5, or M6) for direct installation into valve bodies, cylinders, manifolds, and solenoid ports. Body styles include straight push-in (PB/PC series), 90° elbow push-in (PL series), and a 3-way tee (M5 thread), giving you routing flexibility in a single product family. Materials are typically engineering-grade nylon or PA body with brass or stainless internal components for durability.
These fittings are well suited for miniature pneumatic control systems, robotic actuator tubing, small air-powered jigs and fixtures, and compact compressor accessory lines where space is limited. Whether you're routing 4mm PU tubing through a tight enclosure or connecting a 6mm nylon line to an M5 solenoid valve, these push-in air hose connectors deliver a reliable, leak-resistant seal without specialized tooling.
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Compatibility: Fits standard OD pneumatic tubing (PU, PA, PE) in 3mm, 4mm, and 6mm. Male threads M3, M4, M5, M6 — compatible with most metric pneumatic valves, cylinders, and manifolds. Select your tube OD and thread size from the variant options above.
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Note: Confirm your tube outer diameter and port thread size before ordering. Tube OD and thread size must both match your existing system. If unsure, measure your current fitting or contact us to confirm.
✅ Key Features of These Mini Pneumatic Push-In Fittings
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🔧Tool-Free Tube Insertion — Push-in collet design locks standard OD pneumatic tubing (3mm, 4mm, 6mm) instantly with no clamps or crimping tools required, saving time during assembly.
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📐Three Body Styles in One Family — Choose straight (PB/PC), 90° elbow (PL), or 3-way tee (M5) to handle any routing layout in compact pneumatic circuits without adapters.
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🔩Metric Male Thread Range — Available in M3, M4, M5, and M6 male threads, covering the most common miniature valve body and solenoid port sizes used in pneumatic control systems.
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💧Leak-Resistant Seal — The collet and O-ring mechanism creates a secure, leak-free air hose connection at typical working pressures, reducing downtime from loose or dripping fittings.
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🏗️Compact Mini Profile — Slim body dimensions make these push-in air fittings ideal for tight enclosures, robotic arms, small actuators, and anywhere a standard-size fitting would be too large.
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🔄Reusable & Reconnectable — Tubing can be released and reinserted by pressing the collet release collar, making these fittings reusable during prototyping, maintenance, or circuit reconfiguration.
📐 Technical Specifications — Mini Pneumatic Push-In Fittings
| Product Type |
Mini Pneumatic Push-In Fitting with Male Thread |
| Body Styles |
Straight (PB/PC), 90° Elbow (PL), 3-Way Tee (M5) |
| Tube OD (Outer Diameter) |
3mm (approx. 1/8"), 4mm (approx. 5/32"), 6mm (approx. 1/4") — see variant options |
| Male Thread Sizes |
M3, M4, M5, M6 — see variant options |
| Connection Type |
Push-in collet with O-ring seal (tube side); male metric thread (port side) |
| Compatible Tubing |
PU (polyurethane), PA (nylon), PE (polyethylene) pneumatic tubing |
| Body Material |
Engineering-grade nylon / PA (typically); internal components brass or stainless |
| Working Pressure |
Typically up to 0.8–1.0 MPa (approx. 116–145 psi) — contact us to confirm for your model |
| Working Temperature |
Generally 0°C–60°C (32°F–140°F) — contact us to confirm |
| Thread Standard |
Metric (ISO) male thread |
| Quantity per Order |
See variant options |
❓ Frequently Asked Questions
How do I choose the right size pneumatic push-in fitting?
Match the tube OD (outer diameter) to the fitting's tube port — typically 3mm, 4mm, or 6mm for mini fittings. Then match the male thread to your valve, manifold, or body port: M3, M4, M5, or M6. For reference, 4mm is approximately 5/32" and 6mm is approximately 1/4". When in doubt, measure your existing fitting or check your equipment's port specification before ordering.
What body styles are available and when should I use each?
These mini pneumatic fittings come in three body styles: straight push-in (PB/PC series) for in-line connections, 90° elbow push-in (PL series) for routing tubing around corners or along surfaces, and a 3-way tee (M5 thread) for splitting one air line into two. Choose the style that best matches your tubing layout and available space.
What working pressure can these fittings handle?
Mini pneumatic push-in fittings of this type are generally rated for working pressures up to approximately 0.8–1.0 MPa (116–145 psi) under normal operating conditions. Always verify the rated pressure for your specific model and application, and do not exceed the fitting's rated limit. Contact us to confirm the exact rating for your chosen variant.
Can these fittings be used outdoors or in humid environments?
These fittings are typically constructed from engineering-grade nylon (PA) bodies with brass or stainless internal components, which generally offer good resistance to moisture and mild corrosion. For prolonged outdoor or high-humidity use, ensure the connected tubing and other components are also rated for those conditions. Avoid exposure to strong solvents or chemicals unless confirmed compatible.
Are these fittings compatible with standard pneumatic tubing and valves?
Yes. These push-in fittings are designed for standard OD pneumatic tubing — polyurethane (PU), nylon (PA), or polyethylene (PE) — in 3mm, 4mm, and 6mm outer diameters. The male threads follow standard metric specifications (M3, M4, M5, M6), compatible with most pneumatic valves, solenoids, cylinders, and manifolds that use metric ports. Always confirm the port thread on your equipment before ordering.
Do I need tools or thread tape to install these fittings?
The push-in tube connection requires no tools — simply insert the tube until it clicks and seats securely. For the male thread side, hand-tightening is often sufficient for low-pressure applications. For higher pressures, wrapping the threads with PTFE tape and snugging with a small wrench is generally recommended to ensure a leak-free seal. Do not overtighten, as this may damage the thread or body.
What is the difference between PB, PC, and PL model codes?
PB — Straight push-in barb connector. PC — Straight push-in connector with collet-style release. PL — 90-degree elbow push-in connector. The number following the prefix indicates the tube OD in mm (e.g., PL4 = 4mm tube), and the suffix indicates the male thread size (e.g., M5). Example: PL4-M5 = 90° elbow, 4mm tube, M5 male thread.
🛒 Select your model and tube/thread size above, then add to cart — ships from our US warehouse.
