SpudFiles

Tried mcmaster, they don't have just plain old BSP threads unless I'm an idiot, they have BSPT, BSPP but not BSP.

BSPT= British Standard Pipe thread= BSP.

oh bollocks I'm an idiot.. I thought BSPT stood for BSP Tapered, not thread.

wow. Clearly, I'm staying up too late.

Well they are tapered, just like NPT.

Are you sure?

A quick google search reveals this from wikipedia:

Two types of threads are distinguished:
Parallel ('straight') threads, British Standard Pipe Parallel thread (BSPP; originally also known as[1] British Standard Pipe Fitting thread/BSPF and British Standard Pipe Mechanical thread/BSPM), which have a constant diameter; denoted by the letter G.
Taper threads, British Standard Pipe Taper thread (BSPT), whose diameter increases or decreases along the length of the thread; denoted by the letter R.

So what is a normal BSP? as in, what would this valve be?

I'm pretty sure threads for gas seals are most commonly tapered because of the way they seal. Someone else can chime in though because I've never even touched a BSP fitting.

JDP12 wrote:bollocks

Cunning use of a quintessentially British expletive when talking about their threads

I thought BSPT stood for BSP Tapered, not thread.

It does!

The ones on the QEV are not tapered.

This is what you're looking for if you need an adapter: http://www.ebay.com/itm/HP-fitting-stai ... 2eafa13c16

... kinda removes the advantage of the cheap valve though if you need to buy expensive fittings to use it.

Cunning use of a quintessentially British expletive when talking about their threads

I thought you might appreciate that I must admit you have gotten me using words like bollocks alot in real life, confusing many of the people I hang out with haha

all thanks to you, be proud.

Just to further confuse things, a male BSP taper will seal well with a female parallel thread, but a male parallel thread will not work well with a female taper. Generally speaking taper threads are used more for plumbing, and parallel threads, which require an o-ring or washer for sealing, for pneumatics/hydraulics.
the annoying thing about parallel fittings is they will only seal at a certain orientation, I sometimes get around this by ignoring the sealing ring and whacking some epoxy in instead.

spudamine wrote:I sometimes get around this by ignoring the sealing ring and whacking some epoxy in instead.

A man after my own heart