TYPES OF SCREW HEADS NO FURTHER A MYSTERY

the small print of Pozidriv and Supadriv screws change appreciably; the latter permits a minimal angular offset concerning the screw as well as screwdriver, but Pozidriv calls for that they be lined up specifically. Pan Head- Pan head screws are the commonest kind of rounded screw head. They may be ideal for apps that require a flat-bottomed screw