Originally posted by Not a Number I beg to differ. I bought a Vivitar branded adapter made in India. It was an "absolute piece of garbage" very roughly finished, too tight in the k-mount and the T2 thread was wrong - it wouldn't thread into any of the T2 mounts on the lens side.
T2 mounts been around for how long now, 40, 50 years? It's pretty tough to find an "absolute piece of garbage", you just happen to luck out.
I bought T2 mounts from 3 different Chinese eBay vendors over the years and they all worked just fine.