These are high quality screws. They are indeed stainless steel and true to size. I used these because I ran out of low profile M5 socket head screws that I bought with my OpenBuilds order. I could use them anywhere a low profile wasn't required. The heads of these screws are probably around 2.5-3mm thick, including the height of the "pillow" at the center. The Phillips head is deep and easily screwed in with a PH2 screwdriver. Highly recommend and it's a good price. If you want a low profile look for OpenBuild's M5 socket head screws. At the time of writing, they are available in packs of 100 for around $15-$20.
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