What is the symbol for surface finish on an engineering drawing?

The symbol for surface finish on an engineering drawing is typically represented by a series of lines and a number, known as a surface texture symbol. It includes a basic symbol with a horizontal line and may feature additional elements like arrows or a roughness value (Ra) to specify the required surface finish. The symbol conveys important information about the desired texture and quality of the surface, which is crucial for the part's functionality and aesthetics.