Nylon Cross 4-Way Push-to-Connect Pneumatic Fittings — Split Air Lines in 4 Directions Without Tools
Routing a single air line to multiple tools, sensors, or zones is a common challenge for workshop builders, automation technicians, and DIY pneumatic system designers. Tee fittings only split two ways — and adding multiple tees creates a tangled mess of joints. These nylon cross 4-way push-to-connect pneumatic fittings solve that problem cleanly, letting you branch one air or fluid line into four directions from a single compact body, with no wrenches, thread tape, or crimping required.
Each fitting is a single-piece cross (X-shaped) inline connector made from white nylon (PA) with an internal stainless-steel collet and O-ring seal at each of the four ports. Available in five tube outer diameter sizes: 4mm (≈5/32"), 6mm (≈1/4"), 8mm (≈5/16"), 10mm (≈3/8"), and 12mm (≈1/2"). Sold in packs of 2, 5, 10, or 20 pieces for single builds or bulk stocking.
These 4-way push fit connectors are widely used in pneumatic air distribution manifolds for compressors and spray systems, multi-zone fluid splitting in hydroponics, aquariums, and cooling circuits, and CNC machine and automation air circuits where a single supply line must feed multiple actuators or sensors simultaneously.
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Compatibility: Fits standard nylon (PA), polyurethane (PU), and polyethylene (PE) pneumatic tubing with matching outer diameters of 4, 6, 8, 10, or 12mm. All four ports accept the same tube OD — select your size above.
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Size tip: The fitting size (e.g., 8mm) refers to the tube outer diameter it accepts, not the bore or thread size. Measure your tube OD before ordering. Unused ports can be capped with a matching push-in blanking plug.
✅ Key Features of These Nylon Cross 4-Way Push-to-Connect Pneumatic Fittings
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✖️True Cross 4-Way Split — Four ports in a single compact body let you branch one pneumatic air line into four directions without stacking multiple tee fittings or adding extra joints.
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⚡Tool-Free Push-In Installation — Insert the tube into any port and the internal stainless-steel collet grips it instantly — no wrenches, thread tape, or crimping needed for a secure inline connection.
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🔩Stainless-Steel Collet at Every Port — Each of the four ports has an independent gripper ring that bites into the tube OD under pressure, preventing pull-out even in vibrating or pressurized pneumatic systems.
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💧O-Ring Sealed for Leak-Free Performance — An internal elastomeric O-ring at each port provides a reliable air and fluid seal, suitable for push fit water line connectors and pneumatic circuits alike.
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🏗️Nylon Body — Lightweight & Corrosion-Resistant — The white PA nylon body resists moisture and mild chemicals, making it a practical choice for workshop air systems and fluid handling where metal fittings would corrode.
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🔄Releasable & Reusable at Each Port — Press the collet ring on any individual port to release that tube without disturbing the others, allowing easy system modifications or repairs without replacing the fitting.
📐 Technical Specifications — Nylon Cross 4-Way Push-to-Connect Fittings
| Product Type |
Cross 4-Way Push-to-Connect Pneumatic Fitting |
| Body Material |
White Nylon (PA) |
| Internal Gripper |
Stainless-Steel Collet Ring (one per port) |
| Seal Type |
Internal O-Ring (one per port) |
| Number of Ports |
4 (cross / X configuration) |
| Tube OD Sizes |
4mm (≈5/32"), 6mm (≈1/4"), 8mm (≈5/16"), 10mm (≈3/8"), 12mm (≈1/2") |
| Compatible Tube Types |
Nylon (PA), Polyurethane (PU), Polyethylene (PE) |
| Working Pressure |
Typically up to 150 PSI (≈10 bar) — contact us to confirm |
| Working Temperature |
Generally –20°C to +60°C (–4°F to +140°F) — contact us to confirm |
| Color / Finish |
White |
| Connection Style |
Push-to-Connect (Push Fit), Cross / 4-Way |
| Pack Quantities |
2, 5, 10, or 20 pieces — see variant options |
| Installation |
Tool-free push-in; press collet to release individual ports |
❓ Frequently Asked Questions
How do I choose the right size cross 4-way fitting?
Match the fitting size to your tube's outer diameter (OD). Available sizes: 4mm (≈5/32"), 6mm (≈1/4"), 8mm (≈5/16"), 10mm (≈3/8"), 12mm (≈1/2"). All four ports on a cross fitting are the same size, so all connected tubes must share the same OD. Always measure your tube OD — not the bore — before ordering.
What pressure can these 4-way pneumatic fittings handle?
Nylon push-to-connect fittings of this type are generally rated for working pressures up to approximately 150 PSI (≈10 bar) in typical pneumatic applications. Actual ratings may vary by size — contact us to confirm for your specific use case.
Can I use these cross fittings outdoors or in wet environments?
Nylon is generally resistant to moisture and mild chemicals, making these fittings suitable for damp or lightly wet environments. They are not typically rated for prolonged UV exposure or fully submerged use. For outdoor installations, shield from direct sunlight where possible to extend service life.
What tube types are compatible with these push fit cross connectors?
These cross 4-way push fit connectors are generally compatible with nylon (PA), polyurethane (PU), and polyethylene (PE) pneumatic tubing with matching outer diameters. Ensure the tube wall is firm enough to seat properly in the collet — soft or thin-walled tubing may not seal reliably.
How do I release a tube from a push-to-connect cross fitting?
Depressurize the line first, then press the collet ring inward on the specific port you want to release while simultaneously pulling the tube out. Each port releases independently — you do not need to disturb the other three connections.
Can I use only 3 of the 4 ports and cap the fourth?
Yes — unused ports can generally be capped with a matching push-in blanking plug of the same tube OD size. This lets you use the cross fitting as a T-junction while keeping the option to add a fourth line later without replacing the fitting.
Are these fittings suitable for water or fluid lines as well as air?
Yes — nylon push-to-connect cross fittings are commonly used in low-pressure water, coolant, and fluid distribution lines in addition to pneumatic air systems. They are not recommended for high-temperature steam or aggressive chemical media without confirming material compatibility first.
🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.
