Pneumatic Straight Hose Fitting — Male Thread Push-In Connector (3mm–6mm OD)

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Pneumatic Straight Hose Fitting — Male Thread Push-In Connector (3mm–6mm OD)

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Hose O.D x Male Thread: 3mm x M4

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$2.11 USD

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Pneumatic Straight Hose Fitting — Reliable Male Thread Push-In Connection for Compact Air Systems

When you're routing air lines through tight spaces on robotic assemblies, automation fixtures, or small pneumatic tools, a bulky fitting can block access or create leak points. These mini pneumatic straight connectors are designed for engineers, makers, and technicians who need a compact, secure hose-to-port connection without sacrificing flow or reliability.

Each fitting is a single straight push-in connector combining a hose collet entry and a male metric thread on the opposite end. Hose OD options cover 3mm (≈1/8"), 4mm (≈5/32"), and 6mm (≈1/4"), paired with male thread sizes M3, M4, M5, or M6. The body is typically constructed from engineering-grade plastic (POM or nylon) with a brass or stainless collet insert for grip and durability. Available in packs of 1, 5, or 10 pieces.

Typical use cases include connecting PU or nylon air tubing to solenoid valve ports on compact manifolds, routing pneumatic lines in 3D printer extruder assemblies, and plumbing miniature cylinders in laboratory automation rigs — all applications where a standard 1/4" NPT fitting would simply be too large.

🔵 Compatibility: Fits semi-rigid PU, nylon (PA), and PE tubing with OD of 3mm, 4mm, or 6mm. Male thread is metric (M3–M6) — not NPT or BSP. Confirm your port thread standard before ordering.

✅ Key Features of These Pneumatic Straight Male Thread Push-In Fittings

🔩Metric Male Thread Options — Available in M3, M4, M5, and M6 to match the most common metric-threaded ports on solenoid valves, cylinders, and manifolds in compact pneumatic systems.
📏Three Hose OD Sizes — Covers 3mm (≈1/8"), 4mm (≈5/32"), and 6mm (≈1/4") OD tubing, giving you flexibility across different air line diameters in the same project.
⚡Push-In Collet Design — Insert the hose and the internal collet teeth grip automatically, creating a secure connection without tools. Hose releases by pressing the collet ring inward — no cutting required.
🏗️Compact Straight-Through Body — The inline straight profile keeps the fitting footprint minimal, making it well-suited for tight panel cutouts, PCB-mounted pneumatic modules, and space-constrained automation enclosures.
🛡️Engineering Plastic Construction — The body is typically molded from POM or glass-filled nylon, offering chemical resistance to oils and mild solvents commonly found in compressed-air systems.
📦Flexible Pack Quantities — Order 1, 5, or 10 pieces per variant to match your project scale — whether you need a single replacement fitting or a batch for a production run of pneumatic assemblies.

📐 Technical Specifications — Pneumatic Straight Male Thread Push-In Fittings

Fitting Type	Straight push-in connector with male thread
Hose OD (Tube Size)	3mm (≈1/8"), 4mm (≈5/32"), 6mm (≈1/4") — see variant options
Male Thread Size	M3, M4, M5, M6 (metric) — see variant options
Thread Standard	Metric (ISO) — not NPT or BSP
Body Material	Engineering plastic (typically POM or nylon)
Collet / Insert Material	Typically brass or stainless steel
Working Pressure	Typically up to 0.8–1.0 MPa (116–145 psi) — contact us to confirm
Working Temperature	See variant options / Contact us to confirm
Compatible Tubing	PU, nylon (PA), polyethylene (PE) semi-rigid tubing
Connection Method	Push-in collet (tool-free insertion, press-to-release)
Pack Quantity	1 Pcs, 5 Pcs, or 10 Pcs — see variant options
Finish / Color	See variant options

⚠️ Spec Note: Exact pressure ratings and temperature ranges vary by production batch. If your application is safety-critical, contact us to confirm specifications before ordering.

❓ Frequently Asked Questions

How do I choose the right hose OD and thread size?

Measure your hose outer diameter (OD) — typically 3mm (≈1/8"), 4mm (≈5/32"), or 6mm (≈1/4") — then match the male thread to your port: M3, M4, M5, or M6. When in doubt, check the thread pitch on your equipment port with a thread gauge. The variant label shows both dimensions as "Hose OD × Male Thread" (e.g., 4mm × M5).

What is the maximum working pressure for these fittings?

These mini pneumatic fittings are generally rated for working pressures up to approximately 0.8–1.0 MPa (116–145 psi) in typical compressed-air applications. Always verify the pressure rating against your system specifications before installation, particularly in safety-critical or high-cycle environments.

Are these fittings suitable for outdoor or humid environments?

These fittings are generally made from engineering plastic (POM or nylon) with brass or stainless internals, offering reasonable moisture resistance for indoor pneumatic systems. For prolonged outdoor or high-humidity exposure, consider applying PTFE thread tape and inspecting periodically for UV degradation or collet wear.

What thread standard do these fittings use — metric or NPT?

These fittings use metric male threads (M3, M4, M5, M6) per ISO standards. They are not NPT (National Pipe Thread) or BSP (British Standard Pipe) threads. Confirm your equipment uses metric-threaded ports before ordering. If you need NPT or BSP variants, contact us.

Can I use these fittings with polyurethane (PU) or nylon tubing?

Yes. These straight push-in connectors are generally compatible with semi-rigid PU, nylon (PA), and polyethylene (PE) tubing of the matching OD. Soft or highly flexible silicone tubing may not seal reliably with the collet mechanism — contact us to confirm compatibility for non-standard tubing materials.

How do I release the hose from the fitting?

Depressurize the air line completely before disconnecting. Then press the collet ring (the outer ring at the hose entry port) firmly inward while pulling the hose straight out in one smooth motion. Avoid twisting or yanking the hose at an angle, as this can damage the collet teeth and compromise the seal on reinstallation.

Do I need thread sealant when installing these fittings?

For a leak-free seal, applying PTFE thread tape (2–3 wraps in the direction of the thread) to the male thread before installation is generally recommended, especially in systems operating above 0.5 MPa. This is standard practice for metric pneumatic fittings and adds minimal cost while significantly reducing the chance of air leaks at the port connection.

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

Pneumatic Straight Hose Fitting — Male Thread Push-In Connector (3mm–6mm OD)

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Beschreibung

Pneumatic Straight Hose Fitting — Reliable Male Thread Push-In Connection for Compact Air Systems

✅ Key Features of These Pneumatic Straight Male Thread Push-In Fittings

📐 Technical Specifications — Pneumatic Straight Male Thread Push-In Fittings

❓ Frequently Asked Questions

Pneumatic Straight Hose Fitting — Male Thread Push-In Connector (3mm–6mm OD)

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