The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Frame => Topic started by: Bee-Za on 13.09. 2020 12:43

Title: Tank PET Cock Advise
Post by: Bee-Za on 13.09. 2020 12:43: Hi Bought this tank £5 (35+)years ago. Advise on pet cock size. I'd like to get the taps and make sure they fit before I rattle can paint it.
Links appreciated...........
Title: Re: Tank PET Cock Advise
Post by: Bee-Za on 13.09. 2020 12:45: 0.459 inches is the callipers inside size
Title: Re: Tank PET Cock Advise
Post by: bikerbob on 13.09. 2020 13:19: They will be either 1/4 or 3/8 BSP thread 1/4BSP is 16.662mm- 0.518" 3/8BSP is 16.662mm-0.656"
Title: Re: Tank PET Cock Advise
Post by: RichardL on 13.09. 2020 16:03: Quote from: Bee-Za on 13.09. 2020 12:43
Hi Bought this tank £5 (35+)years ago.

Oh, if we could all just go back and buy our parts 35 years sgo. :o *doh*

Richard L.
Title: Re: Tank PET Cock Advise
Post by: Bee-Za on 13.09. 2020 17:25: Thanks, I'll order 2 x 1/4 BSP thread. If they don't fit I'll just keep them for 35 yrs (if I'm still here) and in Sept 2055 people will be wishing they had had bought them at todays prices. *smile* (Aren't "We" the lucky ones)
Title: Re: Tank PET Cock Advise
Post by: Triton Thrasher on 14.09. 2020 06:25: Quote from: bikerbob on 13.09. 2020 13:19
1/4BSP is 16.662mm- 0.518" 3/8BSP is 16.662mm-0.656"

They can’t both be 16.662 mm.
Title: Re: Tank PET Cock Advise
Post by: groily on 14.09. 2020 07:12: For major and minor diameters and tpi for BSPP(arallel) and BSPT(apered), see for example
http://www.volz.com.au/thread-identification/bspp-bspt-thread-identification-table/
Title: Re: Tank PET Cock Advise
Post by: Rex on 14.09. 2020 09:49: You won't find any tapered pipe threads on BSAs though. ;)
Title: Re: Tank PET Cock Advise
Post by: berger on 14.09. 2020 11:53: You won't find any tapered pipe threads on BSAs though. haha you will on mine *smil*
Title: Re: Tank PET Cock Advise
Post by: bikerbob on 14.09. 2020 17:15: Yes my mistake 1/4 BSP should be 13.157mm - 0.518"