| Motorcycle 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. Allen cap screws need an allen key to do them up. They are ideal as a nice looking alternative to hex set or pan head screws, for example on a crankcase side or a flywheel cowling. Also they may deter the casual thief as any screw can be undone with a screwdriver or adjustable spanner whereas not everyone carries allen keys around |