Pneumatic Push-to-Connect Fittings — Nylon Air Hose Tube Connectors, 22 Types

Match the fitting size to your tube's outer diameter (OD). For example, a 4mm fitting accepts 4mm OD tubing. Sizes listed as OD×ID (e.g., 4×2.5) refer to the outer and inner diameter of the pneumatic tube itself. For threaded fittings (e.g., PC4-M5), the first number is the tube OD and the second is the thread size. When in doubt, measure your existing tube OD with calipers before ordering. Common conversions: 4mm ≈ 5/32", 6mm ≈ 1/4", 8mm ≈ 5/16", 10mm ≈ 3/8", 12mm ≈ 1/2", 16mm ≈ 5/8".

Nylon push-to-connect fittings of this type are generally rated for working pressures up to approximately 150 PSI (10 bar) at room temperature. Actual ratings depend on tube size and operating temperature — confirm with your system specifications before use in high-pressure applications. Throttle valve types (SA, SL) and flow control valves (HVFF) may have different pressure ratings; contact us to confirm.

Nylon (PA) fittings offer good resistance to oils, fuels, and mild chemicals, making them suitable for most workshop and light industrial environments. They are generally not recommended for prolonged UV exposure or highly corrosive chemical environments. For outdoor use, consider protecting fittings from direct sunlight. The NBR O-ring provides good resistance to petroleum-based oils and air.

Threaded variants use metric threads (M3, M5, M6, M8, M10, M12, M14, M16) and BSP (British Standard Pipe) threads: 01 = 1/8" BSP, 02 = 1/4" BSP, 03 = 3/8" BSP, 04 = 1/2" BSP. Check your equipment port thread type before selecting. Use PTFE sealing tape (also available in this listing) on BSP threads for a leak-free seal. Note: BSP and NPT threads are not interchangeable — confirm your standard before ordering.

Choose based on your routing need: PU Straight for inline tube-to-tube connections; PV Elbow for 90° direction changes; PY Wye / PE Tee for splitting one line into two; PZA Cross for four-way splits; PG / PEG Reducing when connecting different tube sizes; PC / PL / PB / PX for connecting tubes to threaded ports (male); PCF for female-threaded ports; PP Blanking Plug to cap unused ports; PM Bulkhead for panel mounting; HVFF / SA / SL for flow control and throttling. When in doubt, refer to your pneumatic circuit diagram.

Yes. Push-to-connect fittings are designed for tool-free insertion and release. To disconnect, press the collet ring inward while pulling the tube out. Fittings can generally be reused multiple times, though the collet and O-ring should be inspected for wear if the fitting has been cycled many times or exposed to high pressure repeatedly. Avoid using damaged or kinked tubing, as this can compromise the collet grip.

These fittings are primarily designed for compressed air systems. They are typically compatible with nitrogen and inert gases as well. They are generally not suitable for water, steam, or aggressive solvents. Always verify compatibility with your specific media before installation. If you need fittings for water or hydraulic applications, contact us for guidance on alternative materials.