adaptall retaining ring

Keeps the fitting components locked in position during assembly so everything lines up right and holds together the way it's supposed to. In a modular adapter system like Adaptall's, that kind of mechanical retention matters for connection integrity, especially when you're building out hydraulic assemblies that need to stay put under working conditions.

For Adaptall’s modular adapter system, the RR-18MM is the 18 mm retaining ring meant to match adapter bodies in that same 18 mm thread range, so it is the correct replacement when your assembly calls for the 18 mm ring.