Screws which might be flat beneath the head don’t want countersinking. when countersunk screws have little or no protruding parts, non-countersunk screw heads are thoroughly uncovered about the surface area.
these https://tiffanydnvh361041.buyoutblog.com/27762306/the-smart-trick-of-types-of-screw-heads-that-no-one-is-discussing