Has anyone tried these? I like the idea, but if they work I'd also like to buy them in bulk.
Tom - I was thinking the same thing last night as I was trying to get a new (used) keg to seal up after cleaning it.
Turns out I do have one of these larger o-rings, and it worked better than the standard though not perfect. I did not warm it up to soften it, though, which always helps.
I've got to imagine McMaster Carr could match it. I'll try to look up some part #s and if I remember to measure the o-ring tonight.