I'm pissed right now. I lent my cymbals to someone, and he managed to loose a wingnut that serves to hold the cymbals down inside the case. Nothing tragic, just a wingnut.
So I get a new one. To my surprise, it doesn't fit. So I put my old sliding caliper back into action and measure the screw. Result: diameter 8 (well, 7.7 actually, but screws are expected to be a bit smaller than they should be), gapping... 1.33? that is the gapping of a 1/4 inch screw, which is supposed to have a diameter of 13. In other words, the screw used to make the case doesn't exist in any sensible norm. You can't get replacements, and you can't get nuts. And if you exchange the whole screw, you can no longer fix the lid.
Seriously, who on earth does something like that? I don't know by how much the production of the case was more expensive for making custom screws and nuts instead of just taking normed ones. this doesn't make any bloody sense at all.
But here I am, without a wingnut.