The problem with the Phillips screw imprint in the nasa image is that it is not "quite" a perfect screw head imprint. So I began to look at tamper-proof Phillip screw images online. One thing led to another and I arrived at this photo of an Alpha particle X-ray spectrometer from a NASA rover. I think you will be impressed!
http://commons.m.wikimedia.org/wiki/File:MER_APXS_PIA05113.jpg
