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Fanklan Steven

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  1. 1.Countersink hole A conical hole which is cut to allow the flat head screw to be used is called a countersink hole. It can also be called as a conical hole that is cut into a PCB laminate, or a hole created by using a drill. The main purpose is to let the head of a countersunk screw, once it is inserted and screwed down in the hole, to sit flush with the surface of the laminate. The cone shaped hole, which is cut into the PCB laminate, is a countersink. It is generally used to permit the tapered head of a screw to sit flush with the top or bottom of the laminate. It is mainly used,
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