Valve cover bolts

Found another nice little tidbit about these stupid things, I am trying to fasten a fuel line clamp to the remaining stud these have and it is 6mm LEFT hand friggin thread! Thanks to whoever came up with that genius idea....

Are you sure? I had a bare head in my garage and don't recall them being left-hand-thread. I do know they ARE metric.

Why would they use left hand thread? This simply doesn't make any sense.

Regards,

Joe Dokes