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XIAOGUO is a Professional manufacturer of Countersunk bolts,you can buy cheap Countersunk Bolt from us. The hole for screwing in the countersunk bolt must be shaped into a conical shape. This allows the countersunk bolt to sink completely into the hole without protruding from the surface of the plate. The use of countersunk bolts is mainly for the sake of smooth and beautiful surface and to prevent problems such as hanging due to the head protruding from the surface. For example, the back or the bottom of a laptop. Some housings are secured with countersunk screws, and in order to prevent the screw head from protruding, conical countersunk holes are machined.