The 5-Second Trick For types of screw heads
they offer a lot more balance towards the utilized force as compared with the Phillips screws. The distinction between a Phillips screw and also a posidriv is usually recognized by seeking them from side. There are ribs in between many of the four arms from the posidriv and therefore are marked by ‘pz’. Bolt (still left) and Screw (ideal) Itâ€