Some of my China-buying has ended in tears. Mainly, I was trying to get some coax F connector adapters to fit to my local coax lightning protector, for my giant China cell booster. The last booster fried with a close bolt, since you have to put the antenna 50 feet up in a tree.
Such a simple thing, until I inevitably found out there are a heck of a lot of F connectors, some out by only a thousandth of an inch. So now I have a bunch of weird F connectors on my desk. :(
So I'm sticking with the antenna-grade N connector, which seems standard, and I haven't gone wrong with it yet. That means I bought an N-connector lightning thing.