Airsoft smith

Hello. I'm searching for my AA12 gbb project the exact thread dimensions of exhaust valves. They look all the same, so it's possible that they have all the same dimensions. https://www.redwolfairsoft.com/prowin-release-valve-for-prowin-model-17-18-hi-capa-mws-m4a1-gbb-gas-magazine.html Edit: looks like nobody is willing to help.