thread size

[2pounder]

If I remember correctly British 2inch fuze threads are 14tpi, but what are American modern similar size threads, dia pitch please as I have a 2'' x 12 tpi UN tap and wonder if it is any use for tidying up shell threads.

 

[TimG]

The Unified thread we adopted from the US to replace the Whitworth form 2" GS gauge was 2" x 12 tpi UNS. We use(d) a number of US fuzes and that was the thread specification. I can't speak for all US fuzes, but if 2" gauge, I would imagine so.

TimG

 

[2pounder]

Thanks Tim, will bring it to the ECRA meet hopefully someone makes me an offer.