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home > Brass Pneumatic Twist Lock Quick Connector Fittings for Tube OD 4–12mm | PE PU PV PZA > Brass Pneumatic Twist Lock Quick Connector Fittings for Tube OD 4–12mm | PE PU PV PZA

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Brass Pneumatic Twist Lock Quick Connector Fittings for Tube OD 4–12mm | PE PU PV PZABrass Pneumatic Twist Lock Quick Connectors Reliable Push to Connect Fittings for Air & Fluid Lines If you've ever dealt with a leaking air line mid project or spent frustrating minutes wrestling with a stubborn tube fitting, you know how much a dependable connector matters. DIYers, workshop owners, and light industrial users who run pneumatic systems with PE, PU, PV, or PZA tubing need a fitting that seats securely, releases cleanly, and holds

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Brass Pneumatic Twist Lock Quick Connectors — Reliable Push-to-Connect Fittings for Air & Fluid Lines

If you've ever dealt with a leaking air line mid-project or spent frustrating minutes wrestling with a stubborn tube fitting, you know how much a dependable connector matters. DIYers, workshop owners, and light industrial users who run pneumatic systems with PE, PU, PV, or PZA tubing need a fitting that seats securely, releases cleanly, and holds pressure without constant re-checking.

Each piece is a solid brass twist lock quick connector machined to accept tube outside diameters (OD) from 4mm (≈5/32") to 12mm (≈1/2"). Available in five OD sizes — 4mm, 6mm (≈1/4"), 8mm (≈5/16"), 10mm (≈3/8"), and 12mm — and four fitting types (PE, PU, PV, PZA) to match your specific tubing material. Brass construction provides solid mechanical strength and resistance to corrosion in typical workshop and light industrial conditions.

These brass pneumatic quick connectors are well suited for compressed air distribution lines in home workshops, pneumatic tool hookups, fluid transfer systems in light machinery, and irrigation control tubing. Whether you're routing an air line to a spray gun, connecting a pneumatic cylinder, or building a modular compressed air manifold, the twist lock mechanism lets you make and break connections quickly without tools.

ℹ️ Compatibility Note: Select the fitting Type that matches your tubing material (PE, PU, PV, or PZA) and the Size that matches your tube's outside diameter (OD) — not the inner bore. Mixing types or sizes may result in an improper seal.

✅ Key Features of These Brass Pneumatic Twist Lock Quick Connector Fittings

🔩Solid Brass Construction — Machined from brass for durability, corrosion resistance in workshop environments, and a longer service life compared to all-plastic push-in fittings.
🔄Tool-Free Twist Lock Mechanism — Insert and twist to lock; reverse-twist to release. Ideal for pneumatic quick connect fittings where fast tube swaps are needed without wrenches or clamps.
📐Five OD Sizes in One Listing — Covers 4mm through 12mm tube outside diameters, making it straightforward to source the right size for both metric pneumatic tubing and common workshop air line sizes.
🧪Multi-Material Tubing Compatibility — Available in PE, PU, PV, and PZA variants so the fitting collet and seal geometry are matched to your specific tubing material for a consistent, leak-resistant connection.
⚡Push-to-Connect Speed — The push-in design seats the tube in one motion, reducing assembly time on pneumatic control panels, air distribution manifolds, and fluid line installations.
♻️Reusable & Repositionable — Disconnect and reconnect without damaging the fitting body, making these connectors practical for prototype builds, temporary air line runs, and reconfigurable pneumatic systems.

⚠️ Spec Confirmation: Thread port size and exact pressure rating vary by fitting type and size. If your application has specific pressure or thread requirements, contact us before ordering to confirm compatibility.

📐 Technical Specifications — Brass Pneumatic Twist Lock Quick Connector Fittings

Product Type	Pneumatic Tube Quick Connector / Twist Lock Coupler Fitting
Body Material	Brass
Compatible Tubing Types	PE (Polyethylene), PU (Polyurethane), PV (PVC), PZA (Nylon/PA)
Tube OD Range	4mm (≈5/32") / 6mm (≈1/4") / 8mm (≈5/16") / 10mm (≈3/8") / 12mm (≈1/2")
Connection Style	Push-to-connect with twist lock release
Working Pressure	See variant options — typically up to ~150 PSI; contact us to confirm
Port Thread Size	See variant options
Finish	Natural brass
Quantity per Order	1 piece (1Pcs) per variant
Sold As	Individual fitting; select type and tube OD above

❓ Frequently Asked Questions

How do I choose the right tube OD size for these fittings?

Measure the outside diameter (OD) of your tubing — not the inside bore. Available sizes are 4mm (≈5/32"), 6mm (≈1/4"), 8mm (≈5/16"), 10mm (≈3/8"), and 12mm (≈1/2"). Always match the fitting size to the tube OD for a leak-free seal. When in doubt, use a caliper rather than estimating by feel.

What is the maximum working pressure these connectors can handle?

Brass twist lock pneumatic fittings of this type generally support working pressures up to approximately 150 PSI (≈10 bar) when used with compatible tubing. Actual rated pressure may vary by size and fitting type. Confirm the rated pressure for your specific application — contact us if you need exact figures before ordering.

Can these fittings be used outdoors or in humid environments?

Brass has inherent corrosion resistance and is generally suitable for moderately humid or damp indoor environments. For prolonged outdoor exposure, direct weathering, or marine conditions, additional protective measures are typically recommended. Contact us to confirm suitability for your specific installation conditions.

What tubing materials are compatible with these quick connectors?

These fittings are designed for use with PE (polyethylene), PU (polyurethane), PV (PVC), and PZA (nylon/PA) pneumatic tubing. Select the fitting type that matches your tubing material. Always verify that the tubing OD matches the selected fitting size for a secure twist-lock connection.

How does the twist lock mechanism work?

Insert the tube straight into the fitting until it seats fully, then twist to lock. To release, twist in the opposite direction and pull the tube out. This tool-free mechanism allows for quick installation and repositioning without special tools — useful for pneumatic control panels and air distribution systems where lines are frequently reconfigured.

Which fitting type should I choose — PE, PU, PV, or PZA?

The type designation refers to the tubing material the fitting is optimized for: PE for polyethylene lines, PU for polyurethane, PV for PVC, and PZA for nylon (PA) tubing. Matching the fitting type to your tubing material ensures the collet and O-ring geometry provide the best seal. If unsure, contact us to confirm compatibility before ordering.

Are these fittings reusable after disconnection?

Yes, brass twist lock fittings are generally reusable. After disconnecting, inspect the O-ring and collet for wear before reconnecting. Replace any worn sealing components to maintain a leak-free connection over repeated use cycles.

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

Brass Pneumatic Twist Lock Quick Connector Fittings for Tube OD 4–12mm | PE PU PV PZA

Name: Brass Pneumatic Twist Lock Quick Connector Fittings for Tube OD 4–12mm | PE PU PV PZA
Brand: terrelite.it
SKU: 37645958169
Price: 142.00 USD
Availability: InStock
Rating: 4.891 (733 reviews)