[Arivaldo]

Originally Posted by Cathar

Your specs are indeed showing that G1/4 is the same as 1/4" BSP, which is what I used.

Oops, you wrote 1/4 BSP i did read 1/4 NPT.

Originally Posted by Cathar

So a little unsure about your statement about me needing to be careful about it, unless you're talking about US people attempting to crank in 1/4" NPT threaded barbs into a G1/4 threaded hole.

Yes, i was talking about to use tapered screws into parallel holes, because G1/4 Major Diameter is 13.157 mm so a NPT Thread Barb could be introduced and forced to crank. Pitch difference and growing diameter would force thread hole.

BTW, there is a BSPT (R1/4 - BSP Tapered), which use same pitch 19, same Major Diameter, but with Tapered Thread...

just for users knowledge...

Originally Posted by Breach

I didn't see anything addressing common size ratings on various types of threads on pipe fittings specifially, so I found a few links.
British and other sizes:
http://mdmetric.com/tech/thddat7.htm
And standard American:
http://mdmetric.com/tech/thdform3.htm
That site also has other national standards on it as well.