Help needed - indetifying threads

[mk2dk]

Hi I have a problem converting this Danish thread size to something that can be used when ordering fittings in UK - ex. from Demon Tweeks.

 

In Denmark the thread is called (1/2" RG) or (whitworth pipethread 55) It has an outside diameter of 20.955 mm - 14 threads pr inch and threadangle is 55 degress. Anyone know the English name for this particular thread ?

[V8ian]

Im fairly certain it the same as BSP [british Standard Pipe], but NOT BSPT,

 

Just Googled it and came up with this, which seems to confirm its BSP,

 

http://www.gewinde-normen.de/en/whitwor ... hread.html

 

Ian

[mk2dk]

Thanks Ian

I'm sure it's 1/2" BSP

All the numbers are identical, and here in Denmark it also has that ISO 228 nr.