Are these somehow custom or different from the ones below? Just curious, I was looking for some other things on Aliexpress and stumbled into these. Definitely a bit surprised to see them there.
https://www.aliexpress.com/item/10PC-M5-Aluminum-Flanged-Nylon-Lock-Nut-Dark-Red-Gold-Royal-Blue-Black/32764724908.html
https://www.aliexpress.com/item/10pcs-M5-Anodized-Multi-color-Aluminum-Alloy-Nylon-Flange-Nut/32652629457.html