Tus kheej tapping screws tuaj yeem laum steel daim hlau, tab sis nws nyob ntawm lub thickness ntawm steel phaj. Lub zog siab ntawm tus kheej tapping screws tuaj yeem siv rau galvanized steel daim hlau nrog lub thickness ntawm 1.2 hli los yog tsawg dua, cov ntawv hlau, lossis cov vuas hlau xim. Hom taw tes yog pheej yig dua li drilling tail screws thiab tuaj yeem txuag nqi. Hlau daim hlau nrog lub thickness ntawm 2 hli los yog ntau tshaj yuav tsum xaiv qhov tsim nyog specifications ntawm drilling tail screws. Drilling tail screws kuj yog ib hom ntawm tus kheej tapping screws uas tuaj yeem yooj yim xyaum los ntawm cov hlau phaj nrog lub thickness ntawm li 2 hli mus rau 6 hli.