Ib tug self-tapping ntsia hlau tsim nws tus kheej mating xov raws li nws yog tsav mus rau hauv ib yam khoom. Es tsis txhob yuav tsum tau ib tug pre-threaded qhov, cov ntsia hlau txiav, cov ntaub ntawv, los yog tshem tawm cov khoom los tsim ib tug ruaj ntseg fastening txoj kev. Qhov no ua rau nws muaj txiaj ntsig zoo hauv cov hlau, yas, ntoo, cov vaj huam sib luag sib xyaw, thiab ntau daim ntawv thov sib dhos uas ceev thiab ua haujlwm tseem ceeb. Hauv kev tsim, kev tsim kho, rooj tog tsim khoom, cov khoom siv sib dhos, cov khoom siv tsheb, thiab cov khoom siv hluav taws xob, tus kheej tapping screws pab txo ...