thread size on swaybar endlinks

my endlinks broke when we installed my 2" budget boost and I am going to replace them with stock size one, but I want to make my own disconnects. I was thinking of lathing up some large knurled spin-on wingnut type pieces for the top..... what threads would I need to tap into it to spin on correctly?

Stock endlinks are 10mm i think. I plan on doing the same thing as you. Just need to do some welding to extend them or find a coupler/union nut (proving to be hard).