Ninu mejeeji ikole ati awọn ohun elo ile-iṣẹ, awọn skru countersunk wa lilo jakejado nitori agbara wọn lati wọ inu awọn aaye ati ṣetọju irisi didan. Awọn apẹrẹ oriṣiriṣi ti awọn skru countersunk, gẹgẹbi apẹrẹ ododo, apẹrẹ-agbelebu, slotted, ati hexagonal, gba laaye…
Ka siwaju