[S10xGN]

I've used them before, never had a problem. I have noticed though, the quality of "offshore" pipe threads has gone way down over the years. Bottoming out means the threads were cut too deep or of the wrong taper. Might try cleaning it up and doping the threads?

Russ

 

[S10xGN]

The kits I'm familiar with had heavy white nylon washers around 3/16" thick and they sealed well as long as you remembered to use a backup wrench when removing the plug so the sealing interface wasn't disturbed. They have nicer ($$$) options out there:

Russ