Leakage methods
Pressure decay, positive-pressure liquid leakage or subatmospheric-pressure air leakage.
ISO 80369-20 is the common method center for leakage, separation, torque and stress-cracking workflows. The buyer still needs the application part, connector side, reference connector and documentation route.

Pressure decay, positive-pressure liquid leakage or subatmospheric-pressure air leakage.
Resistance to separation from axial load and related mechanical setup.
Unscrewing, overriding or related torque-channel behavior.
Stress cracking evaluation for connector condition after exposure and assembly context.