The Tube Connector Stainless Steel 430 for Water or Gas Lines Pneumatic Fittings

Product Description:

We machine Tube Connector Stainless Steel 430 for Water or Gas Lines Pneumatic Fittings from Qimao Metal Manufacturer, material is 430 stainless steel , which is a ferritic grade with about 16-18% chromium content. Good enough for water, air, and mild chemical environments, though we do not recommend it for marine or high-chloride conditions. The two ends are stepped to different diameters—20mm on the larger side and 14.86mm on the smaller side—with matching internal bores of 14.95mm and 8.42mm. This stepped design is meant for connecting tubes of different sizes, which is common in pneumatic distribution systems where you are stepping down from a main line to a branch line. The ID and OD tolerances are held to ±0.05mm, which gives you a snug fit without needing sealant on every joint. We deburr every piece after machining, both ends and internal bores, so there are no sharp edges to cut O-rings during assembly. That is a small step, but it saves your installers from damaged seals and rework.

Specification:

Products Details:

The Tube Connector Stainless Steel 430 for Water or Gas Lines Pneumatic Fittings 430 material we use comes with mill test certificates, so the chromium content and mechanical properties are traceable. We turn these on CNC Swiss-type lathes, which gives us consistent surface finish across the entire run—usually around Ra 1.6 on the sealing surfaces. The larger end has a slight chamfer on the inside bore, which helps guide the tube in during assembly. You will also notice a small flat band on the outer face of both ends. That is not decorative; it provides a positive stop when you bottom out the tube, so you know the insertion depth is correct every time. Threads are not cut on this particular version—it is a push-fit or ferrule-type design, depending on how your system is set up. If you need threaded ends, we can do that too, but that becomes a custom job. For stock items, this is our standard configuration, and we keep a few hundred pieces on the shelf at all times.

Product Feature:

• The Tube Connector Stainless Steel 430 for Water or Gas Lines Pneumatic Fittings’s stepped diameters at both ends – 20mm on one side, 14.86mm on the other. This lets you connect different tube sizes without hunting for extra adapters.

• 430 stainless steel construction – gives you better corrosion resistance than plain carbon steel, at a lower cost than 304 or 316.

• Precision machined internal bores – held to ±0.05mm tolerance for a consistent slip fit without excessive play.

• Deburred thoroughly after machining – we hit both ends and the bores. No sharp edges left behind to cut O-rings or scratch up soft tubing during installation.

• Light oil coating applied after machining – protects against storage rust for up to three months in normal warehouse conditions.

• Lot traceability – each batch carries a code that ties back to the raw material cert and machining shift.

Product Application:

• The Tube Connector Stainless Steel 430 for Water or Gas Lines Pneumatic Fittings mostly in pneumatic distribution systems. Steps down from 20mm main line to 14.86mm branch, no extra adapters needed.

• Water cooling loops on welding equipment and laser cutters. Clean circulation through smaller tubing.

• Got a factory automation setup? You will find these on instrumentation air lines, connecting sensors and control valves to the main supply.

• Low-pressure gas lines in labs or light industrial settings. Works fine within rated limits.

• Maintenance repairs – damaged tubing gets cut out, this fitting adapts between whatever sizes are there.

• HVAC condensate drains – smaller end to the drain tube, larger end to the main line.