How tight should I screw the Locking Sleeve?

The Locking Sleeve should be Hand Tight only. Its purpose is to mechanically hold the connectors together against vibration, not to create the watertight seal. Using a wrench to over-tighten it can crack the plastic (POM) sleeve or strip the threads.

Do not confuse the locking sleeve with the sealing mechanism.

Function: The seal is created by the radial compression of the rubber, which happens when you push the connectors together. The sleeve just prevents them from pulling apart.
Vibration: If the equipment is subject to heavy vibration (e.g., a rock drill), you may tighten the sleeve an additional 1/4 turn with strap pliers, but be extremely careful not to deform it.

John Zhang

(CEO & Lead Engineer)
Email: info@hysfsubsea.com
With over 15 years of expertise in subsea interconnect technology, I lead HYSF's R&D team in designing high-pressure (60MPa) solutions. My focus is on ensuring zero-leakage reliability for ROVs, AUVs, and offshore instrumentation. I personally oversee the validation of our custom connector prototypes.

Have a complex technical question?

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