Pneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air Fitting
Pneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air Fitting
Pneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air Fitting
Pneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air Fitting
Pneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air Fitting
Pneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air Fitting
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Pneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air FittingPneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air FittingPneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air FittingPneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air FittingPneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air FittingPneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air Fitting

Pneumatic 4mm OD Tube x M5/M6 Male Straight Push-to-Connect Air Fitting

HomeDIYer
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By HomeDIYer®

Price:
$1.35 USD
Stock:
In stock (500 units), ready to be shipped

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Description

4mm Push-to-Connect Air Fittings — Instant, Tool-Free Pneumatic Tube Connections

Routing compressed-air lines through tight spaces or retrofitting a pneumatic circuit shouldn't require special tools or complicated compression sleeves. These 4mm OD push-to-connect pneumatic fittings let hobbyists, automation technicians, and workshop builders make secure, leak-resistant tube connections in seconds — just push the tube in until it clicks and you're done.

Each fitting features a male straight body with either an M5 or M6 metric thread on one end and a push-in collet on the other, accepting standard 4mm OD (≈5/32") pneumatic tubing. Available in single units or economical 5-pack and 10-pack quantities so you can stock up for larger builds.

Typical applications include small pneumatic cylinder porting, solenoid valve tube connections, air-line distribution manifolds, and DIY automation rigs where 4mm tubing and M5/M6 threaded ports are standard. The straight male configuration is also widely used in miniature air-circuit assembly and benchtop pneumatic testing setups.

🔵 Compatibility Note: Designed for 4mm OD pneumatic tubing (PU, PA, or PE) with M5 or M6 metric male threads. Select your thread size from the variant options above. Not compatible with imperial BSP or NPT threaded ports without an adapter.

✅ Key Features of These 4mm Push-to-Connect Pneumatic Fittings

  • ⚡Tool-Free Tube Insertion — The collet-style push-in mechanism grips 4mm OD tubing instantly; no wrenches, ferrules, or crimping tools required for the tube side.
  • 🔩Metric Male Thread Body — Available in M5 and M6 thread sizes to match the most common ports on pneumatic cylinders, solenoid valves, and manifold blocks used in compact automation.
  • 🔄Straight-Through Flow Path — The male straight configuration delivers an unobstructed inline connection, minimizing pressure drop in low-flow compressed-air circuits.
  • 🛡️Collet Grip with Positive Lock — The internal collet teeth bite into the tube OD under pressure, creating a push-to-connect air line connection that resists accidental pull-out during normal operating pressures.
  • 📦Flexible Pack Sizes — Order a single fitting for a quick repair or choose the 5-pack or 10-pack to keep spares on hand for ongoing pneumatic circuit builds and maintenance.
  • 🏭Compact Form Factor — The small body dimensions make these fittings well-suited for tight panel cutouts, miniature pneumatic assemblies, and space-constrained automation enclosures.

📐 Technical Specifications — Male Straight Push-to-Connect Pneumatic Fitting

Tube OD 4mm (≈5/32")
Thread Type Metric male (M5 or M6 — see variant options)
Thread Pitch M5 × 0.8mm / M6 × 1.0mm (standard metric coarse)
Fitting Style Male straight, push-to-connect (push-in collet)
Compatible Tubing PU, PA (nylon), PE — 4mm OD
Working Pressure Typically up to 150 PSI (≈10 bar) — see variant specs to confirm
Body Material See variant options / Contact us to confirm
Seal Material See variant options / Contact us to confirm
Pack Quantity 1 / 5 / 10 (select above)
Thread Standard ISO metric (not BSP or NPT)
Country of Origin See variant options
⚠️ Heads up: Always depressurize the air line before inserting or removing tubing. Apply PTFE thread tape to the male threads before installation to ensure a leak-free seal.

❓ Frequently Asked Questions

How do I choose between M5 and M6 thread size?

Match the thread size to your equipment port. M5 has a 5mm nominal thread diameter and is typically found on smaller pneumatic cylinders and solenoid valves. M6 (6mm thread diameter) is generally used on slightly larger ports. Check your equipment's port marking or measure the thread OD with calipers before ordering.

What tube outer diameter does this fitting accept?

This fitting is designed for 4mm OD (outer diameter) pneumatic tubing, which is approximately 5/32 inch. It will not reliably seal with 3mm or 6mm OD tubing.

How much pressure can these fittings handle?

Push-to-connect pneumatic fittings of this type are generally rated for working pressures up to approximately 150 PSI (≈10 bar) in typical compressed-air applications. Consult your system specifications to confirm suitability for your exact use case.

Can these fittings be used outdoors or in humid environments?

The fittings are typically constructed from nickel-plated brass or engineering-grade polymer bodies with NBR or polyurethane seals, which offer reasonable resistance to moisture. For prolonged outdoor or high-humidity exposure, verify the specific material of the variant you receive and consider additional sealing measures.

Do I need thread tape or sealant when installing?

In most cases, applying PTFE thread tape (1–2 wraps) to the male threads before installation is recommended to ensure a leak-free seal, especially on metal-to-metal connections. The push-in tube side requires no additional sealant.

How do I release the tube from the fitting?

To release the tube, depressurize the line first, then press the collet ring (the outer ring around the tube entry) inward while pulling the tube straight out. Avoid twisting the tube during removal to protect the collet teeth.

Are these fittings compatible with polyurethane (PU) and nylon (PA) tubing?

Yes. Push-to-connect fittings of this style are generally compatible with standard 4mm OD pneumatic tubing materials including polyurethane (PU), nylon (PA), and polyethylene (PE). Silicone tubing is typically not recommended as it is too soft for reliable collet grip.

🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.

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