Stainless Steel Straight Reducing Push-to-Connect Fitting — Pneumatic Tube Adapter

The size format is Large OD × Small OD, both in millimeters. For example, 10mm-6mm connects a 10mm outer diameter tube on one end to a 6mm outer diameter tube on the other. Always measure the outer diameter of your tubing with calipers before ordering. Common inch equivalents for reference: 6mm ≈ 1/4", 8mm ≈ 5/16", 10mm ≈ 3/8", 12mm ≈ 1/2", 14mm ≈ 9/16", 16mm ≈ 5/8".

Stainless steel push-to-connect fittings of this type typically support working pressures up to 150 PSI (approximately 10 bar) at standard ambient temperatures. Always verify your system's operating pressure and temperature against the fitting's rated specifications before installation in high-demand applications.

Yes. The stainless steel body provides strong resistance to rust, moisture, and mild chemical exposure. These fittings are generally suitable for outdoor pneumatic systems, humid industrial environments, and food-adjacent equipment where corrosion resistance is a priority. For highly aggressive chemical environments, contact us to confirm compatibility.

These fittings are typically compatible with standard metric OD pneumatic tubing including polyurethane (PU), nylon/polyamide (PA), and polyethylene (PE) tubing. The tube outer diameter must match the fitting port size exactly. Soft or oversized tubing may not seat correctly — use tubing within standard metric OD tolerances.

No tools are required for tube insertion. Simply push the tube straight in until it seats fully — the internal collet and O-ring create a secure, leak-free connection automatically. No thread sealant is needed on the push-fit tube side. If the fitting has a threaded port on one end, use appropriate thread sealant tape (PTFE) on that connection only.

First, depressurize the line completely. Then press the collet ring inward toward the fitting body while simultaneously pulling the tube straight out. Avoid twisting or pulling at an angle, as this can damage the collet teeth. The fitting is generally reusable after tube removal if the collet and O-ring are undamaged.

These fittings are primarily designed for compressed air and pneumatic systems. They may generally work for low-pressure water lines or mild vacuum applications, but suitability depends on the O-ring material and your specific system conditions. Contact us to confirm compatibility before using in liquid or vacuum service.

For a single repair or prototype, the 1 Pcs option is sufficient. If you're building a small pneumatic circuit with multiple branch points, the 2 Pcs or 5 Pcs pack offers better value per fitting. Maintenance teams stocking spare parts typically find the 5-piece pack most cost-effective for common sizes.