Of course this is totally off topic now, but worth discussing for others that stumble across this thread and wonder about the various nut choices.
I assumed that you had lost the nyloc and replaced it with the classic two-nuts-locked-off solution.
Why Lotus use a nyloc or K-nut is not known to me, but I assume it's because the nut is subject to some rotational forces that might make it undo in normal service (a bit like a low energy version of the drive shaft nuts). Every balljoint I can remember seeing has had a nyloc on it (I know because it's a royal PITA to undo when the balljoint is old and loose and the thread is rusty).
If that is the case then you ARE relying on the two nuts being locked off against one another, otherwise you don't have anything to resist the forces that make the nut come undone.
If that is all true then you are relying on stretching the bolt between the two nuts (as well as relying on stretching the bolt from the inner nut down to the ball joint itself). Without that stretch between the nuts they cannot be locked off.
Over to Woody or somebody else that knows what they're talking about (i.e. not me
) ...
Cheers,
Robin
P.S. In real life these things rust so fast that you could probably put it on hand tight with a crappy old nut off the garage floor and it would never come undone
... though the bolt might snap in the end!
