Tuning Need advice on manometer

[El_Teacher]

My .25 cal Fx streamline manometer broke down, does anyone knows what kind of dimensions of the thread and entry are to buy another one ? 

Thanks in advance

 

[Glem.Chally]

1/8 bspp, I'd get a Wika assuming a 28mm diameter would work where it goes on a streamline.

 

[El_Teacher]

1/8 bspp, I'd get a Wika assuming a 28mm diameter would work where it goes on a streamline.

Thank you very much, very kind for the info !