Steel Metric Flareless Fitting, 10.00 mm WALpro Series Nut

This union nut is designed for a 10 mm outer diameter tube.

The 500 bar figure is the maximum operating pressure for this specific fitting. The broader 160 to 630 bar range covers the full Series S classification, which includes multiple sizes and configurations. Where this particular nut lands within that range depends on the application setup, but 500 bar is the rated ceiling for this part. The 4:1 safety factor applies across the series, so that holds here as well.

It matches a 10 mm tube outer diameter and an M 16x1.5 thread, and it is called out as a WALpro Series union nut for metric steel flareless fittings.