I’m assembling something bought from the store. Neither screw is labelled, and the manual says one of them is M5x10mm and the other is M6x10mm. I cannot tell which is which. Please help.
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The number after M is the nominal diameter of the threaded portion in millimetres. So M6 is "thicker" than M5. In the photo in your question, M6 seems to be the one on the left, but holding the two threaded ends right next to each other will tell you which one is which with absolute certainty.
TooTea
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The screw on the left side of the photo is the M6. It is visibly larger than the one on the right. The right side bolt is M5 by default.
mikes
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0
Unlike some items' measurements, which bear little logical reasoning, metric setscrews, and basically all metric stuff will reflect the actual physical measurements.
Thus, the one with a larger diameter thread must be M6, the smaller, M5. Along with that measurement go two others, the fairly obvious length of the screw, and more importantly, the tpi - the number of threads per inch. Except in metric (no surprise) the number of threads per unit isn't inches!
The 10 represents the length of the screw, as can be seen, both are the same 10mm long.
Tim
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