I-self-tapping screws luhlobo oluqhelekileyo lwesixhumi somatshini, kunye noyilo lwazo olulodwa luvumela u-self-drilling kunye nokudibanisa ngokuthe ngqo kwi-metal okanye i-plastiki substrates ngaphandle kwemfuneko yokubethelwa kwangaphambili ngexesha lofakelo. Olu yilo luyinguqulelo luyilula kakhulu inkqubo yofakelo, lwandisa ukusebenza kakuhle, kwaye lunciphisa iindleko.
Izikrini zokuzibamba ngokuqhelekileyo zenziwe ngentsimbi ephezulu, kwaye umphezulu uphathwa nge-galvanization, i-chrome plating, njl., Ukwandisa ukusebenza kwabo okuchasene ne-corrosion kunye nokwandisa ubomi babo benkonzo. Ukongeza, zinokuthi zigqunywe ngokweemfuno ezahlukeneyo, ezinje ngee-epoxy coatings, ukubonelela ukuxhathisa okuphezulu kwe-corrosion kunye nokumelana namanzi.