Pan Head Screws - Protrudes above the surface of the material to be fastened and are measured from under the head to the end of the screw. Cross Head Pan Screws: It is easy to confuse pan head screws with cheese head screws but comparing the two you can see that a pan head has a more domed rounded head. The head is slightly wider than a cheese head. The length of these screws refers to the length of the threaded section, not the whole screw.