1. Tus kheej tapping screws yog tsuas yog siv rau kev sib txuas thiab kev kho ntawm qee qhov nyias nyias, xws li kev sib txuas ntawm cov xim hlau daim hlau, kev sib txuas ntawm cov xim hlau phaj thiab purlins, phab ntsa kab teeb, thiab lwm yam. Lawv cov peev xwm nkag tau feem ntau tsis tshaj 6 hli, thiab qhov siab tshaj plaws tsis pub tshaj 12mm.
2. Tus kheej tapping screws feem ntau raug tawm sab nraud thiab muaj zog corrosion kuj; Nws cov roj hmab sealing nplhaib tuaj yeem ua kom ntseeg tau tias tsis muaj dej xau ntawm cov ntsia hlau thiab muaj kev tiv thaiv corrosion zoo.
3. Tus kheej tapping screws feem ntau tau piav qhia siv peb qhov tsis muaj: ntsia hlau txoj kab uas hla series, xov tooj ntawm ib nti ntev, thiab ntsia hlau ntev. Muaj ob hom ntsia hlau taub theem: 10 thiab 12, nrog rau cov ntsia hlau diameters ntawm 4.87mm thiab 5.43mm, feem; Muaj peb theem ntawm threads ib nti: 14, 16, thiab 24. Qhov ntau threads ib nti, lub zog ntawm tus kheej drilling peev xwm.