Review on Set of 4 Black Bolt-in Flush Mount Valve Stems by Circuit Performance by David Tadder

Firstly the threads on the stems of this valve suck, the inflation valve doesn't screw all the way in so the valves will still work but why would they have an o-ring? If they don't screw everything on like there should be a second then the caps won't screw all the way down due to bad threads and the o-ring will not seal as a result allowing water and dirt to enter the valve, not good, not sure whether I have a bad batch. or what, but it's garbage