Did that once, luckily it's on a hack and an LED will fix it nicely. :lol:
The thread counts are easily mistaken, the plastic screws are a bit fine and the metal screws are a bit coarse. Both were engineered for ease of production and an extremely low cycle count. The metal screws are particularly interesting, a nice balance between a self-tapping sheet metal screw and a bolt. Both might be called a self-tapping machine screws intended for the untapped plastic and the deep stamping in the chassis. That's exactly what the metal version is AFAIK or can tell.