What size are pneumatic nuts?

[AidenMD]

What size are the nuts used on pneumatic cylinders? Our team has lost a few of them and we might want to buy a few more. Much appreciated. Thanks

[vrc]

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[jpearman]

See this topic, read to the end

Pneumatic Air Reservoir End Nut Size

Hi all. Can someone tell me what the big nut size that’s located at each end of the air cylinder? I’ve searched this form and google, but to no avail… Vex doesn’t appear to sell this part individually either, and their pneumatic system is not in stock. I just need the nut for the expansion mechanism. thanks much!

Edit: oops, misread “cylinder” for “reservoir”, so just ignore that.