Propane Tank Adapter Converts POL LP Tank Service Valve to QCC1 / Type1 Hose or Regualtor - Old to New qcc1 Propane Fitting

Dimensions of the end that goes into the propane tank, 3/4 inch or 1inch male end ?

I need help connecting my generator to a forklift fill/vapor fitting. If ur not sure or just want to talk this question is not for you. ?

Are the small threads that screw into the tank fitting left or right hand threads? If so, I have a 20lb. Will it work?

Will this work on 3/4 black pipe?