And the reason why it’s like that is because there is no good manual for the hexagon. If you read the Lulzbot manuals, you could think you have to tighten the nozzle to the heater block to prevent leakage. That’ the important wrong thing, where you have a high chance to strip the threads!
I recomend to read the howtos for the e3d v6 nozzle, their internals are nearly the same so the guides are valid for hexagon also.
Or read my instructions here: Can't stop Hexagon hotend leakage Short summary: You dont need a torque tool, you don’t even need force. If you don’t apply force, there is no risk of stripping threads. Problems solved 
The trick is to screw the nozzle against the heat brake, not the nozzle against the heater block!