Vim hais tias cov xim tsis muaj hlau thiab cov hlau muaj cov tseem ceeb sib txawv. Stainless hlau muaj zoo ductility. Yog hais tias nws yog siv tsis zoo, nws yuav yooj yim ua rau lub unscrewing ntawm stainless hlau ntsia hlau txiv ntoo. Nws nquag hu ua "locking" lossis "tom qoob tuag". Yog li, koj yuav tsum them nyiaj rau cov lus hauv qab no thaum siv:
(1) Lub txiv ntseej yuav tsum tau muab ntsia hlau ntsia mus rau ntawm lub ntsej muag ntawm lub hau ntswj, tsis txhob hlais;
(2) Thaum txoj kev zawm, qhov kev quab yuam yuav tsum yog yam tsis zoo thiab qhov kev quab yuam yuav tsum tsis pub dhau qhov kev nyab xeeb torque; (nrog rau txoj kev ntsuas qhov ntsuas phom)
(3) Siv lub zog nqus hluav taws xob los yog lub qhov ntsaws qhov ncauj kom ntau li ntau tau kom zam tsis txhob siv tus ciaj ntswj los yog tus ciaj ntswj hluav taws xob;
(4) Nws yuav tsum tau txias thaum nws raug siv hauv high temperature, thiab yuav tsum tsis txhob tig rov qab sai sai thaum siv, kom tsis txhob cia li nce siab hauv qhov kub thiab kaw;