Thread Type Identification

[Saeppi]

I bought a bidet shower head (Chinese import) and need to replace the top end. I thought it was a 3/4” UNF thread but was wrong-the UNF pitches are larger. It cant be a British one either as their thread pitches are even larger. I attached a picture, and maybe you know where I should continue my search. Thanks!

 

[Mr_David]

Those thread standards are for fasteners like bolts and screws and do not apply here.
For example threads for various aerators vary by manufactures.
Some use a common thread dimension where others are specific to their units only, making interchangeability impossible.
Some manufactures will use a common thread sizes for some things like supply connection

 

[Saeppi]

Thanks, Mr_David. Would you know what the best way is too measure/copy such threads?

 

[Mr_David]

I googled " thread pitch gauge "
HD has one.
https://www.google.com/search?q=thr...X&ved=0ahUKEwiH5tjhnNvbAhUqsFQKHS2kD9wQsxgIKA