This leads to thread stripping, gaskets being squeezed out and, as a result, to hopeless damage to sometimes quite expensive equipment. The connections are tightened manually, without a key, and to be on the safe side, they are tightened just a little bit with a tool. https://www.facebook.com/permalink.php?story_fbid=pfbid0ZqaQ6D6osfw6KdB1bC2ThZCY91TQr7BDzDwtFvx5mXddfkNWw2Rc2AqXEitshkptl&id=100075713173054&__cft__[0]=AZWFlvUXR1XqAxlct7CaqSlpGvmgakc2aaO2iW4e_I7jODZ6VlTL82kblzz63v77zpqmRYfbHPYr4WPAi1G53cDlkoIT6GhRUM-vBLAHx_P7ZFFWcrNXL6gqbeTp9ls0LgA&__tn__=%2CO%2CP-R