A machined groove on the nut confirms proper ferrule presence and alignment at hand tight conditions. It also confirms proper tightening after makeup without the need for a separate gauge.
A 90° stop prevents over-tightening of the fitting.
With proper tube preparation, a sealing point pierces the tube upon fitting make-up to provide an additional sealing point and to eliminate dead space.
Special coating lowers installation torque and prevents galling.
Proprietary hardening process on both ferrules allows for superior tube bite.