M5 flat nuts

Many parts of a MendelMax printer, require flat, rectangular and thin nuts and I found is frustrating trying to find them on the market. At first, I used the flat nuts I found in the electrical switches but I learned that I have to break a lot of them in order to find a handful of nuts.
Then I said "why not making them myself" and did it! They work the same way the M5 T-slot nuts I made work and they really hold well and tight.