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*A full rounded screw top is called a round head | *A full rounded screw top is called a round head | ||
*A shallow round head is called a pan head | *A shallow round head is called a pan head | ||
*A cylindrical head with an allen / hex key hole is called a | *A cylindrical head with an allen / hex key hole is called a cap head screw, cap screw or socket head screw | ||
*A conical head intended to lie flush with the surface is called a countersunk head | *A conical head intended to lie flush with the surface is called a countersunk head | ||