First Class Member
- Feb 1, 2007
- Reaction score
- Narellan Vale, New South Wales,
I just can't resist being punny.Did you mean "LEAD" or "LED", as in Light Emitting Diode?
A good 5 mm is 3/16", or so. That means that you have nearly as much thread gone through the nut and out the other side as is inside the nut doing the work. The nuts might be open-ended, but they are also oval so that the nut gets a good grip on the screw. By running the screw as far as you have done, you are rounding the oval and reducing the holding ability of the nut. You are giving the screw the chance to loosen with vibration, although in this location you will notice it and can access it easily for re-tightening.when the panel is tightened up the screws protrude a good 5mm beyond the end of the nut plate.
That's what they are designed to do. That is how they lock.By running the screw as far as you have done, you are rounding the oval and reducing the holding ability of the nut.