Quote Originally Posted by MrToad View Post
NPSM seals between a groove in the female thread (the block) and a flange on the male thread.

BSPP with O-ring (Gx/x") has a groove on the nut of the male fitting to hold the O-ring in place and seals against a flat surface on the female thread.



The threads in the Storm, as well as the MCW30, MCW60 and so on are 1/4" NPSM, hence he "wide flange".

And FYI, BPSS is many things, but none of them directly related to plumbing. However, BSPP is British Standard Pipe Parallel, (short form: BSP, as if it's not tapered, or BSPT, then it must be parallel).

Now that I've let some steam out, back to my personal war of attrition with the rodents...
I am terrible with acronyms (chronic metathisis). I know it stands for British Standard Pipe Parallel though...

If there were a slight bevel before the female threads I could see the DD fittings working better.

I was refering only to the type of fitting used on the Storm not the size...My Storm shipped with 3/8 and 1/2 barbed 1/4 BSPP and I still wonder why something in that same style but in 3/8 is so hard to find...

Thanks again guys! I should be making some headway with the backplane this week. The steel enclosure for this prototype is in the works as I post.

Rodents? Nothing some LN2 can't fix...