mystery turret bolt

[halocline]

On the left is one of the SS MK5 turret bolts that Zung had made. This looks very similar to the MK5 bolts in my MK5s. On the right is a supposed MK5 brass turret bolt that I bought from a lot of parts that Zung purchased from a European SP dealer. (I think) Anyhow, I hadn't even bothered to look at the brass bolt until this morning when I was organizing some parts. Obviously it's not a MK5 bolt that would work in any of my MK5s. The question is, what is it?

 

[Zung]

It doesn't look it would fit anything Scubapro! Can any other buyers of this lot confirm?

I don't remember if I looked at every single bolt, but the ones I checked look like the one on the left, except they're shinier because they're chrome plated.

 

[redacted]

It looks to me like Matt is going to need another regulator.

 

[Couv]

OK....1 for Matt, 2 for me. I just rummaged through my spare parts and I came across one like Matt's and another odd ball. I think I bought the round headed one from a Tusa dealer thinking it would work in a MK 10, but it doesn't.