Small wing for small cylinders, where to buy?

[SelfDiver]

Do I read it right, diameter is 1 48/64 inch?

1 and 3/4 inch.
I don't have a way to measure the thread pitch.
The dive rite inflator also works with BCD over pressure valve assemblies off Amazon.
I  want demand to see a review when you finally use this new wing/donut

 

[happy-diver]

https://boltdepot.com/Fastener-Information/Printable-Tools/US-and-Metric-Thread-Sizes.pdf

Here you go our most venerable slack taking up saviour, a printable thread pitchomometer

 

[SelfDiver]

https://boltdepot.com/Fastener-Information/Printable-Tools/US-and-Metric-Thread-Sizes.pdf

Here you go our most venerable slack taking up saviour, a printable thread pitchomometer

I am done with this guy

 

[happy-diver]

Yeah, but like when you end a call, and put the phone down, then receive another call
you answer it, with the same attitude as any other call, with a firm willingness to assist

 

[Agro]

Thank you for all this information, great forum, great members!
I mesured
- my friends China Wing 46.8mm
- my Dive Rite pull dump valve (A) on my Dive Rite Classic Wing which I have in use, 46.8mm
- my Dive Rite pull dump valve (B) which I have in my box, 53.7mm

China wing and A have the same thread, the are interchangable.
B is completely different.
Dive Rite has/had 2 different threads. Strange.
Both Dive Rite cap nuts have the same surface, different to SelfDiver's nut. SelfDivers BCD tool does not match. So it seems Dive Rite has a third kind of valve, or at least an other kind of nut outside.

So I have a Dive Rite pull dump valve in my box which will not fit China wing.
I have a Dive Rite pull dump valve in use which would fit China wing but I can not take it away as I need it.

This means first of all a must buy a Dive Rite pull dump valve 46.6mm. Any idea where to get it? As soon as I have it I will buy a China wing.