Tank PET Cock Advise

[Bee-Za]

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...........

[Bee-Za]

0.459 inches is the callipers inside size

[bikerbob]

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"

[RichardL]

Hi Bought this tank £5 (35+)years ago.

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

Richard L.

[Bee-Za]

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.  (Aren't "We" the lucky ones)

[Triton Thrasher]

1/4BSP is 16.662mm- 0.518"  3/8BSP is 16.662mm-0.656"

They can’t both be 16.662 mm.

[groily]

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/

[Rex]

You won't find any tapered pipe threads on BSAs though.

[berger]

You won't find any tapered pipe threads on BSAs though. haha you will on mine

[bikerbob]

Yes my mistake 1/4 BSP should be 13.157mm - 0.518"